US Patent No: 5,558,674
Number of patents in Portfolio can not be more than 2000
Devices and methods for posterior spinal fixation
Stats
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Sep 24, 1996
Issued date -
Dec 17, 1993
filing date -
priority date (Note) -
08/169,998
serial no -
Expired
status (Note)
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Abstract
Disclosed are novel devices and methods for modular occipital/spinal fixation, general bone fixation, as well as skull fracture repair, wherein a novel orthopedic plate designed for unicortical engagement of the bone, particularly the occiput, is employed which exhibits greater stability and safety over conventional methods. Also disclosed is a novel method and device for posterior spinal fixation, preferably involving the use of a locking screw/plate assembly for posterior facet screw fixation of cervical and thoracic vertebrae. A novel locking screw and locking tool is further disclosed which may be used with the inventive orthopedic plate and spinal fixation devices as well as other orthopedic devices.
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First Claim
Family
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
| Patent Owner | Address | Total Patents |
|---|---|---|
| DOHERTY, BRIAN | MEMPHIS, TN | 1 |
| HEGGENESS, MICHAEL | MEMPHIS, TN | 0 |
International Classification(s)
Inventor(s)
| Inventor Name | Address | # of filed Patents | Total Citations |
|---|---|---|---|
| Doherty, Brian J | Weston, MA | 18 | 1290 |
| Heggeness, Michael H | Bellaire, TX | 13 | 1012 |
Cited Art Landscape
| Patent Info | (Count) | # Cites | Year |
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| * 5,176,678 Orthopaedic device with angularly adjustable anchor attachments to the vertebrae | 205 | 1991 | |
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| * 5,171,279 Method for subcutaneous suprafascial pedicular internal fixation | 387 | 1992 | |
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| * 5,176,679 Vertebral locking and retrieving system | 81 | 1991 | |
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| * 2004/0055,711 Manufacture of a strip by extrusion of a tube then flattening the tube | 2003 | ||
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| * 4,493,317 Surgical compression plate and drill guide | 281 | 1981 | |
* Cited By Examiner
Patent Citation Ranking
Forward Cite Landscape
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 6,974,461 Fixation system for bones | 43 | 2000 | |
| 7,476,228 Distraction screw for skeletal surgery and method of use | 24 | 2003 | |
| 7,618,443 Occipito fixation system and method of use | 22 | 2005 | |
| 8,172,855 Devices and methods for inter-vertebral orthopedic device placement | 3 | 2005 | |
| 8,070,749 Revisable anterior cervical plating system | 3 | 2006 | |
| * 8,187,276 Odd angle internal bone fixation device for use in a transverse fracture of a humerus | 0 | 2006 | |
| 7,909,871 Devices and methods for inter-vertebral orthopedic device placement | 13 | 2006 | |
| 8,870,920 Devices and methods for inter-vertebral orthopedic device placement | 0 | 2006 | |
| 8,968,366 Method and apparatus for flexible fixation of a spine | 0 | 2007 | |
| 8,303,630 Devices and methods for the minimally invasive treatment of spinal stenosis | 2 | 2007 | |
| 8,876,874 Bone screw systems and methods of use | 0 | 2007 | |
| 8,343,194 Anterior cervical staple | 0 | 2008 | |
| 8,894,651 Method of lateral facet approach, decompression and fusion using screws and staples as well as arthroplasty | 0 | 2008 | |
| 8,366,748 Apparatus and method of spinal implant and fusion | 4 | 2009 | |
| 8,845,688 Devices and methods for inter-vertebral orthopedic device placement | 0 | 2010 | |
| 8,308,776 Devices and methods for dynamic fixation of skeletal structure | 0 | 2010 | |
| 8,398,689 Devices and methods for dynamic fixation of skeletal structure | 0 | 2010 | |
| 8,496,689 Spinal implant device with fusion cage and fixation plates and method of implanting | 1 | 2011 | |
| * 8,425,560 Spinal implant device with fixation plates and lag screws and method of implanting | 0 | 2011 | |
| 8,556,895 Revisable anterior cervical plating system | 1 | 2011 | |
| D667542 Spinal distraction instrument | 8 | 2012 | |
| D700322 Intervertebral surgical tool | 4 | 2012 | |
| 8,808,305 Spinal fusion cage system with inserter | 0 | 2012 | |
| 8,870,882 Apparatus and method of spinal implant and fusion | 0 | 2013 | |
| 8,845,696 Devices and methods for dynamic fixation of skeletal structure | 0 | 2013 | |
| D723682 Bone graft delivery tool | 0 | 2013 | |
| 8,858,556 Revisable anterior cervical plating system | 0 | 2013 | |
| 8,845,701 Devices and methods for dynamic fixation of skeletal structure | 0 | 2014 | |
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| * 8,348,981 Minimal access occipital plate | 0 | 2009 | |
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| 7,322,984 Spinal plate with internal screw locks | 23 | 2005 | |
| 7,438,715 Spinal implant kit | 27 | 2005 | |
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| 8,403,966 Clavicle plate and screws | 0 | 2008 | |
| * 8,444,679 Clavicle plate and screws | 0 | 2009 | |
| * 2010/0131,013 CLAVICLE PLATE AND SCREWS | 4 | 2009 | |
| 8,790,377 Clavicle plate and screws | 0 | 2013 | |
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| 7,749,251 Method and apparatus for stabilization of facet joint | 1 | 2003 | |
| 8,562,683 System and method for spinal fusion | 0 | 2010 | |
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| 8,162,994 Posterior stabilization system with isolated, dual dampener systems | 5 | 2007 | |
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| 8,864,654 Method and apparatus for performing retro peritoneal dissection | 0 | 2011 | |
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| 7,232,441 Occipital plate and rod system | 37 | 2003 | |
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| * 8,366,751 Bone plate having elevations permitting countersinking of bone screws | 1 | 2007 | |
| * 2008/0015,593 BONE PLATE | 22 | 2007 | |
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| 8,496,688 Flexible spine fixing structure | 0 | 2010 | |
| 8,702,758 Flexible spine fixing structure | 0 | 2011 | |
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| 8,182,511 Craniospinal fusion method and apparatus | 0 | 2010 | |
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| 8,496,693 Bone screw retaining and removal system | 1 | 2010 | |
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| 6,899,716 Method and apparatus for spinal augmentation | 173 | 2002 | |
| 6,921,403 Method and apparatus for spinal distraction and fusion | 160 | 2002 | |
| 7,309,338 Methods and apparatus for performing therapeutic procedures in the spine | 67 | 2003 | |
| 7,087,058 Method and apparatus for providing posterior or anterior trans-sacral access to spinal vertebrae | 102 | 2003 | |
| 7,569,056 Methods and apparatus for forming shaped axial bores through spinal vertebrae | 31 | 2004 | |
| 8,052,613 Spinal nucleus extraction tool | 8 | 2004 | |
| 7,740,633 Guide pin for guiding instrumentation along a soft tissue tract to a point on the spine | 15 | 2004 | |
| 7,588,574 Kits for enabling axial access and procedures in the spine | 34 | 2004 | |
| 7,530,993 Method of spinal fixation | 24 | 2004 | |
| 7,500,977 Method and apparatus for manipulating material in the spine | 51 | 2004 | |
| 7,608,077 Method and apparatus for spinal distraction and fusion | 30 | 2005 | |
| 7,547,317 Methods of performing procedures in the spine | 25 | 2006 | |
| 7,641,657 Method and apparatus for providing posterior or anterior trans-sacral access to spinal vertebrae | 10 | 2006 | |
| 7,744,599 Articulating spinal implant | 12 | 2007 | |
| 7,727,263 Articulating spinal implant | 12 | 2007 | |
| 7,799,032 Guide pin introducer for guiding instrumentation through soft tissue to a point on the spine | 11 | 2007 | |
| 7,763,025 Spinal fusion kit for guiding instrumentation through soft tissue to a point on the spine | 29 | 2007 | |
| 7,799,033 Access kits for enabling axial access and procedures in the spine | 15 | 2007 | |
| 7,794,463 Methods and apparatus for performing therapeutic procedures in the spine | 12 | 2007 | |
| 7,914,535 Method and apparatus for manipulating material in the spine | 8 | 2009 | |
| 8,034,055 Method and apparatus for providing access to a presacral space | 6 | 2009 | |
| 8,292,928 Method and apparatus for spinal distraction and fusion | 0 | 2009 | |
| 8,105,365 Methods and apparatus for performing therapeutic procedures in the spine | 4 | 2010 | |
| 8,308,777 Method and apparatus for removable spinal implant extending between at least two adjacent vertebral bodies | 0 | 2010 | |
| 8,317,867 Methods and apparatus for performing therapeutic procedures in the spine | 1 | 2012 | |
| 8,709,087 Methods and apparatus for performing therapeutic procedures in the spine | 0 | 2012 | |
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| 7,942,912 Occipitocervical plate | 3 | 2005 | |
| 8,241,337 Occipitocervical plate | 0 | 2007 | |
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| 7,468,069 Static anterior cervical plate | 6 | 2004 | |
| 7,288,095 Bone plate with screw lock | 35 | 2004 | |
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| 7,172,628 Spinal disc prosthesis and methods | 12 | 2004 | |
| 7,918,890 Spinal disc prosthesis and methods | 0 | 2004 | |
| 7,862,617 Spinal disc prosthesis apparatus and placement method | 0 | 2006 | |
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| 8,906,028 Bone graft delivery device and method of using the same | 0 | 2010 | |
| 8,685,031 Bone graft delivery system | 1 | 2013 | |
| 8,709,088 Fusion cage with combined biological delivery system | 1 | 2013 | |
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| 8,574,268 Highly-versatile variable-angle bone plate system | 1 | 2008 | |
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| 8,574,270 Bone plate assembly with bone screw retention features | 0 | 2012 | |
| 8,814,915 Dynamic vertebral column plate system | 0 | 2012 | |
| 8,882,812 Bone plate assembly with plates that ratchet together | 0 | 2013 | |
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| * 8,002,802 Devices and methods for inter-vertebral orthopedic device placement | 6 | 2006 | |
| 8,088,163 Tools and methods for spinal fusion | 21 | 2009 | |
| 8,292,960 Spinal fusion cage with removable planar elements | 8 | 2012 | |
| 8,715,355 Spinal fusion cage with removable planar elements | 0 | 2012 | |
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| * 6,139,550 Skeletal plating system | 344 | 1998 | |
| 6,533,786 Anterior cervical plating system | 231 | 1999 | |
| D440311 Anterior cervical plate | 76 | 1999 | |
| 6,712,818 Method for connecting adjacent vertebral bodies of a human spine with a plating system | 182 | 2000 | |
| 6,616,666 Apparatus for compressing a spinal disc space disposed between two adjacent vertebral bodies of a cervical spine | 63 | 2000 | |
| 6,592,586 Single-lock anterior cervical plating system | 136 | 2000 | |
| 6,527,776 Locking element for locking at least two bone screws to an orthopedic device | 167 | 2000 | |
| 6,428,542 Single-lock anterior cervical plate | 214 | 2000 | |
| 6,416,528 Anterior cervical plating system, instrumentation, and method of installation | 88 | 2000 | |
| 6,383,186 Single-lock skeletal plating system | 178 | 2000 | |
| 6,669,698 Vertebrae fastener placement guide | 61 | 2000 | |
| 6,692,503 System and method for securing a plate to the spinal column | 99 | 2001 | |
| 7,077,844 Segmentable skeletal plating system | 69 | 2002 | |
| 7,740,630 Anterior cervical plate system having vertebral body engaging anchors and connecting plate | 9 | 2002 | |
| 7,186,256 Dynamic, modular, single-lock anterior cervical plate system having assembleable and movable segments | 42 | 2002 | |
| 7,118,573 Dynamic anterior cervical plate system having moveable segments, instrumentation, and method for installation thereof | 45 | 2002 | |
| 7,097,645 Dynamic single-lock anterior cervical plate system having non-detachably fastened and moveable segments | 40 | 2002 | |
| 7,044,952 Dynamic multilock anterior cervical plate system having non-detachably fastened and moveable segments | 51 | 2002 | |
| 7,041,105 Dynamic, modular, multilock anterior cervical plate system having detachably fastened assembleable and moveable segments | 49 | 2002 | |
| 7,074,221 Anterior cervical plate system | 66 | 2002 | |
| 6,916,320 Anterior cervical plate system | 105 | 2002 | |
| 7,137,984 Single-lock anterior cervical plate and method | 46 | 2003 | |
| 7,060,068 Vertebrae fastener placement guide | 45 | 2003 | |
| 8,048,075 Orthopedic implant with locking element | 7 | 2004 | |
| 7,399,301 Instrumentation for use with dynamic single-lock anterior cervical plate system having non-detachably fastened and moveable segments | 19 | 2004 | |
| 7,115,130 Method for installing dynamic, modular, multilock anterior cervical plate system having detachably fastened assembleable and moveable segments | 37 | 2004 | |
| 7,112,202 Method for installing dynamic, modular, single-lock anterior cervical plate system having assembleable and moveable segments | 59 | 2004 | |
| 7,651,497 Segmentable plate with locking element | 18 | 2004 | |
| 7,811,285 Dynamic, modular, single-lock anterior cervical plate system having assembleable and moveable segments and instrumentation for installation thereof | 7 | 2004 | |
| 7,803,157 Dynamic, modular, multilock anterior cervical plate system having detachably fastened assembleable and moveable segments and instrumentation for installation thereof | 11 | 2004 | |
| 8,123,788 Plating system having retaining member that permits movement of at least one bone fastener | 5 | 2004 | |
| 7,625,381 System and method for stabilizing a portion of the spine | 15 | 2004 | |
| 7,824,432 Method for installation of dynamic anterior cervical plate system having moveable segments | 3 | 2004 | |
| 7,621,943 Method for installing dynamic multilock anterior cervical plate system having detachably fastened and moveable segments | 10 | 2005 | |
| 8,048,076 Method for installation of anterior cervical plate system having vertebral body engaging anchors and connecting plate | 4 | 2005 | |
| 7,704,250 Instrumentation for use with dynamic multilock anterior cervical plate system having non-detachably fastened and moveable segments | 13 | 2005 | |
| 7,547,306 Method for installation of dynamic, single-lock anterior cervical plate system having non-detachably fastened and moveable segments | 12 | 2005 | |
| 8,323,283 Plate system having bone portion engaging anchors and connecting plate | 0 | 2005 | |
| 8,016,864 Anterior implant for the spine | 3 | 2007 | |
| 7,985,224 Method for installation of dynamic, single-lock anterior cervical plate system having non-detachably fastened and moveable segments | 3 | 2009 | |
| 8,167,919 System and method for securing a plate to the spinal column | 1 | 2009 | |
| 8,834,533 Dynamic plate system having moveable segments | 0 | 2010 | |
| 8,262,708 Single-lock plating system | 4 | 2012 | |
| 8,480,717 Orthopedic implant with locking element | 3 | 2012 | |
| 8,641,743 Orthopedic implant with locking element | 0 | 2013 | |
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| 6,902,565 Occipital plate and system for spinal stabilization | 35 | 2001 | |
| 8,221,421 Sternum fixation device | 1 | 2005 | |
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| 8,496,691 Side-biased orthopedic fastener retention | 0 | 2006 | |
| 8,496,708 Flanged interbody fusion device with hinge | 1 | 2006 | |
| 8,470,039 Flanged interbody fusion device with fastener insert and retaining ring | 0 | 2006 | |
| 8,100,955 Orthopedic expansion fastener | 24 | 2006 | |
| 8,696,721 Orthopedic expansion fastener | 0 | 2011 | |
| 8,801,794 Flanged interbody fusion device with fastener insert and retaining ring | 0 | 2013 | |
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| 6,679,883 Cervical plate for stabilizing the human spine | 88 | 2002 | |
| 7,766,947 Cervical plate for stabilizing the human spine | 1 | 2004 | |
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| 7,077,843 Cervical plate | 18 | 2003 | |
| 7,175,623 Cervical plate with backout protection | 18 | 2004 | |
| 8,652,181 Cervical plate | 0 | 2006 | |
| 8,778,001 Cervical plate | 0 | 2007 | |
| 8,486,115 Spinal plate assemblies with backout protection cap and methods | 0 | 2009 | |
| 8,211,154 Bone plate assemblies with backout protection and visual indicator | 1 | 2009 | |
| 8,506,567 Occipital plate fixation system | 0 | 2009 | |
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| 8,197,513 Facet fixation and fusion wedge and method of use | 9 | 2007 | |
| 8,043,334 Articulating facet fusion screw | 20 | 2007 | |
| 8,133,261 Intra-facet fixation device and method of use | 9 | 2007 | |
| 8,133,280 Methods and devices for expanding a spinal canal | 0 | 2008 | |
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| 8,361,149 Wedge-like spinal implant | 0 | 2009 | |
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| 7,727,264 Intramedullary fixation device for metaphyseal long bone fractures | 10 | 2003 | |
| 7,857,838 Anatomical distal radius fracture fixation plate | 4 | 2003 | |
| 7,780,711 Fixation system with multidirectional bone supports | 7 | 2004 | |
| 7,527,639 Fixation system with multidirectional bone supports | 9 | 2004 | |
| 7,780,664 Endosteal nail | 3 | 2004 | |
| 7,425,213 Method of endosteal nailing | 7 | 2004 | |
| * 8,172,886 Bone plate with pre-assembled drill guide tips | 1 | 2004 | |
| 7,563,263 Intramedullary fixation device for metaphyseal long bone fractures | 13 | 2005 | |
| 7,695,502 Bone stabilization system including plate having fixed-angle holes together with unidirectional locking screws and surgeon-directed locking screws | 19 | 2005 | |
| 7,905,909 Bone stabilization system including multi-directional threaded fixation element | 4 | 2006 | |
| 7,771,433 Bone fracture fixation plate shaping system | 10 | 2006 | |
| 7,935,126 Bone plate shaping system | 6 | 2006 | |
| 7,740,634 Method of bone plate shaping | 28 | 2006 | |
| 7,604,657 Bone fixation plate with complex suture anchor locations | 20 | 2006 | |
| 7,842,037 Flexible bone fixation device | 3 | 2006 | |
| 7,988,691 Orthopaedic trauma bone plate kit | 7 | 2007 | |
| 8,114,080 Flexible bone fixation device | 0 | 2007 | |
| 8,556,945 Anatomical distal radius fracture fixation plate with ulnar buttress | 0 | 2010 | |
| 8,403,967 Volar fixation system and methods of using the same | 0 | 2010 | |
| 8,579,946 Anatomical distal radius fracture fixation plate | 0 | 2010 | |
| 8,545,540 Bone plate with pre-assembled drill guide tips | 1 | 2010 | |
| 8,858,562 Bone plate shaping system | 0 | 2011 | |
| 8,241,338 Bone plate with pre-assembled drill guide tips | 4 | 2011 | |
| 8,834,537 Drill guides for bone plate | 0 | 2013 | |
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| D656610 Spinal distraction instrument | 15 | 2011 | |
| 8,277,510 Tools and methods for spinal fusion | 7 | 2011 | |
| D696399 Spinal distraction instrument | 0 | 2012 | |
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| 7,862,588 Devices and methods for dynamic fixation of skeletal structure | 32 | 2006 | |
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| * 8,439,956 Method of performing a decompressive craniectomy | 1 | 2007 | |
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| * 6,077,266 Method of enabling bone screws to be installed at an angle in underlying bone | 29 | 1999 | |
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| 7,682,392 Regenerative implants for stabilizing the spine and devices for attachment of said implants | 12 | 2002 | |
| 8,343,196 Bone plate | 4 | 2006 | |
| 8,894,685 Facet fixation and fusion screw and washer assembly and method of use | 0 | 2007 | |
| 8,470,003 Laminoplasty plates and methods of expanding the spinal canal | 1 | 2009 | |
| 8,425,515 Bone graft loading instruments and methods of connecting a bone graft to a bone plate | 2 | 2009 | |
| 8,425,520 Bone plate holder | 1 | 2010 | |
| 8,758,346 Variable angle compression plate | 0 | 2010 | |
| 8,449,580 Methods and devices for expanding a spinal canal | 0 | 2012 | |
| 8,845,697 Posterior vertebral plating system | 0 | 2012 | |
| 8,876,824 Sternum fixation device | 0 | 2012 | |
| 8,845,698 Bone plate | 0 | 2012 | |
| 8,876,873 Bone plate | 0 | 2013 | |
| 8,852,245 Bone plate | 0 | 2013 | |
| 8,926,616 Bone plate holder | 0 | 2013 | |
| 8,906,093 Devices and methods for facilitating controlled bone growth or repair | 0 | 2013 | |
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| * 7,824,429 Method and apparatus for spinal fixation | 9 | 2003 | |
| 8,715,284 Method and apparatus for bone fixation with secondary compression | 0 | 2005 | |
| 7,648,523 Method and apparatus for spinal stabilization | 18 | 2005 | |
| 7,857,832 Method and apparatus for spinal stabilization | 15 | 2005 | |
| 7,901,438 Method and apparatus for spinal stabilization | 5 | 2005 | |
| 8,109,977 Method and apparatus for spinal fixation | 2 | 2007 | |
| 7,993,377 Method and apparatus for spinal fixation | 2 | 2007 | |
| 7,998,176 Method and apparatus for spinal stabilization | 5 | 2008 | |
| 8,945,190 Method and apparatus for spinal fixation | 0 | 2011 | |
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| 7,736,380 Cervical plate system | 9 | 2005 | |
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| * 2010/0324,557 MINIMAL ACCESS OCCIPITAL PLATE | 4 | 2009 | |
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| 7,338,526 Method and apparatus for computerized surgery | 109 | 2001 | |
| 7,497,868 Method and apparatus for computerized surgery | 1 | 2004 | |
| 7,491,219 Method and apparatus for computerized surgery | 5 | 2004 | |
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| 7,695,500 Polyaxial occipital plate | 12 | 2007 | |
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| 8,672,981 Osteosynthesis plate comprising through-openings which are inclined in relation to the plane of the plate | 0 | 2006 | |
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| 6,193,721 Multi-lock anterior cervical plating system | 353 | 1998 | |
| D449692 Anterior cervical plate | 113 | 1998 | |
| 6,620,163 Anterior cervical plating system and bone screw | 148 | 2000 | |
| 6,398,783 Multi-lock anterior cervical plate | 157 | 2000 | |
| 6,454,771 Anterior cervical plating system | 138 | 2001 | |
| 6,969,390 Anterior cervical plating system and bone screw | 74 | 2003 | |
| 6,936,050 Multilock anterior cervical plating system | 68 | 2003 | |
| 6,936,051 Multilock anterior cervical plating system | 75 | 2003 | |
| 6,926,718 Multilock anterior cervical plating system | 47 | 2003 | |
| 7,704,255 Threadless multi-lock anterior cervical plating system | 12 | 2004 | |
| 7,621,942 Variable geometry occipital fixation plate | 20 | 2005 | |
| 7,901,433 Occipito-cervical stabilization system and method | 10 | 2006 | |
| 8,147,527 Adjustable occipital plate | 0 | 2006 | |
| 8,246,662 Modular occipital plate | 0 | 2006 | |
| 8,636,737 Modular occipital plate | 0 | 2007 | |
| 8,007,499 Variable geometry occipital fixation plate | 4 | 2009 | |
| 8,337,496 Variable geometry occipital fixation plate | 1 | 2011 | |
| 8,740,953 Adjustable occipital plate | 0 | 2012 | |
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| 8,926,666 Cervical spine spacer | 0 | 2011 | |
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| 6,575,979 Method and apparatus for providing posterior or anterior trans-sacral access to spinal vertebrae | 169 | 2000 | |
| 6,558,386 Axial spinal implant and method and apparatus for implanting an axial spinal implant within the vertebrae of the spine | 145 | 2000 | |
| 6,790,210 Methods and apparatus for forming curved axial bores through spinal vertebrae | 131 | 2000 | |
| 6,740,090 Methods and apparatus for forming shaped axial bores through spinal vertebrae | 124 | 2000 | |
| 6,558,390 Methods and apparatus for performing therapeutic procedures in the spine | 289 | 2001 | |
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| 8,002,832 Spinal implant and method of using spinal implant | 7 | 2008 | |
| 7,942,932 Spinal implant and method of using spinal implant | 5 | 2008 | |
| 8,226,718 Spinal implant and method of using spinal implant | 1 | 2008 | |
| 8,016,887 Spinal implant with overlay | 1 | 2009 | |
| 8,246,683 Spinal implant | 0 | 2009 | |
| 8,673,006 Spinal implant | 0 | 2010 | |
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| 7,563,275 Bone fixation implant system and method | 18 | 2004 | |
| 8,206,400 Percutaneous translaminar facet fixation system | 1 | 2006 | |
| 8,002,812 Bone fixation implant system and method | 1 | 2008 | |
| 8,574,266 Percutaneous facet fixation system | 0 | 2009 | |
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| 7,905,905 Spinal mobility preservation apparatus | 2 | 2007 | |
| 7,905,908 Spinal mobility preservation method | 5 | 2007 | |
* Cited By Examiner
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text
US Patent No: 5,558,674
Devices and methods for posterior spinal fixation
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