BELL COMMUNICATIONS RESEARCH, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C09D COATING COMPOSITIONS, e.g. PAINTS, VARNISHES, LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR 191
 
  
 
G02F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS 1132
 
  
 
H04B TRANSMISSION 1209
 
  
 
H04J MULTIPLEX COMMUNICATION 1124
 
  
 
H04M TELEPHONIC COMMUNICATION 1162
 
  
 
H04Q SELECTING 1109

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7103360 Switching telephone calls between wireline and cellular telephonesOct 23, 01Sep 05, 06[H04Q]
5933489 Method and apparatus for handling subscription and administrative requests in a local service management systemAug 08, 97Aug 03, 99[H04M]
5716437 Materials for use in electrode manufactureMar 07, 96Feb 10, 98[C09D]
5175743 Spread-time code division multiple access technique with arbitrary spectral shapingNov 22, 91Dec 29, 92[H04B, H04J]
5113275 Temperature compensation of liquid-crystal etalon filtersJul 03, 91May 12, 92[G02F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2003/0033,701 Carbon fabric supercapacitor structureAbandonedJan 18, 01Feb 20, 03[H01G, H05K]
5932374 Lithium magnesium manganese oxy-fluorides for Li-ion rechargeable battery electrodesExpiredDec 04, 97Aug 03, 99[H01M]
5720110 Configuration for detecting gaps in a conductor rail for electric rail vehicles being fed through conductor railsExpiredOct 30, 95Feb 24, 98[B61K]
5150007 Non-phosphor full-color plasma display deviceExpiredMay 16, 91Sep 22, 92[H01J, H05B, G09G]
5121216 Adaptive transform coding of still imagesExpiredJul 19, 89Jun 09, 92[H04N]
5105655 Rheological device for in situ measurements of photo polymerization kineticsExpiredJan 18, 91Apr 21, 92[G01N]
5107113 Method and apparatus for correcting distortions in scanning tunneling microscope imagesExpiredDec 26, 90Apr 21, 92[H01J]
5091320 Ellipsometric control of material growthExpiredJun 15, 90Feb 25, 92[H01Q]
5079428 Electron microscope with an asymmetrical immersion lensExpiredAug 31, 89Jan 07, 92[H01J]
5045994 Emulation process having several displayed input formats and output formats and windows for creating and testing computer systemsExpiredSep 23, 86Sep 03, 91[G06F]
4963114 Process for fabrication of high resolution flat panel plasma displaysExpiredJul 10, 89Oct 16, 90[H01J]
4955037 Apparatus and methods for recovering alignment from a non-ideally encoded multi-bit digital signalExpiredJan 19, 89Sep 04, 90[H04B]
4863813 Primary source of electrical energy using a mixture of fuel and oxidizerExpiredSep 15, 88Sep 05, 89[H01M]
4814622 High speed scanning tunneling microscopeExpiredNov 06, 87Mar 21, 89[H01J, G01N]
4804639 Method of making a DH laser with strained layers by MBEExpiredNov 04, 87Feb 14, 89[H01L]
4788716 Public opinion polling systemExpiredDec 22, 87Nov 29, 88[H04M]
4782478 Time division circuit switchExpiredMar 04, 87Nov 01, 88[H04Q, H04J]
4779135 Multi-image composerExpiredSep 26, 86Oct 18, 88[H04N]
4779265 Multiple access communication systemExpiredOct 27, 86Oct 18, 88[G08C, H04B, H04J]
4773085 Phase and frequency detector circuitsExpiredJun 12, 87Sep 20, 88[H03D]

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