THES INVESTMENTS LIMITED LIABILITY COMPANY

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G11B INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER 17121
 
  
 
G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED BY A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR 159
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 1284

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7149173 Medium for recording optically readable data, method for making same and optical system reproducing said dataOct 17, 01Dec 12, 06[G11B]
6958956 Magneto-optical reading device for multi-track magnetic tapesAug 04, 00Oct 25, 05[G11B]
6765755 Anti-abrasive reading headFeb 20, 02Jul 20, 04[G11B]
5933940 Method of manufacturing a recording/reading matrix magnetic headJul 03, 97Aug 10, 99[G11B]
5920448 Matrix type recording/reading head with zigzag structureOct 14, 97Jul 06, 99[G11B]
5872764 Light emitter-receiver device and optical reading systemOct 16, 96Feb 16, 99[G11B]
5870361 Device and system for reading recording media with cross-talk correction circuitryDec 15, 95Feb 09, 99[G11B]
5838743 System for serial reception or reading of informationAug 09, 95Nov 17, 98[H04L]
5703845 Reading device with cross-talk correction of two signal trainsNov 15, 95Dec 30, 97[G11B]
5657304 Optical recording medium with a diffraction grating layerAug 03, 95Aug 12, 97[G11B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7460456 Radial control method for a device for reproducing information of an optical disk, and reproduction device for carrying out said methodExpiredMar 25, 03Dec 02, 08[G11B]
6977875 Tracking system for recording/reading a data medium and recording mediumExpiredJul 09, 99Dec 20, 05[G11B]
6944102 Magneto-optical reader which is optimized by the incident-light polariserExpiredDec 12, 00Sep 13, 05[G11B]
6157471 Display panel with compensation by holographic birefringent filmsExpiredApr 14, 99Dec 05, 00[G02B]
6110261 Chamber with drierExpiredMay 12, 99Aug 29, 00[B01D]
5986834 Clock circuit for the reading of sequentially recorded information elements in a multitrack recording systemExpiredJun 07, 95Nov 16, 99[G11B]
5812333 System for the reading of a multitrack recording medium for enabling the reading of a number of information samples on the width of each trackExpiredApr 10, 95Sep 22, 98[G11B]
5218595 Device for reading oblong segments of an advancing storage mediumExpiredJan 18, 91Jun 08, 93[G11B]
5093980 Method for making a multitrack headExpiredJun 15, 90Mar 10, 92[G11B]
5079484 Voltage-regulated supply, notably for microwave tubesExpiredNov 27, 89Jan 07, 92[H05B]
5064270 Optical fiber sensorExpiredDec 19, 90Nov 12, 91[G01L, G02B, G01B, G01D]
5059878 Device for the dynamic measurement of the torque of a self-synchronous motor and device for the servo-control of a self-synchronous motor using this deviceExpiredJun 28, 90Oct 22, 91[G01L]
5056919 Device for measuring a phase shift which is not reciprocal produced in a ring interferometerExpiredOct 06, 81Oct 15, 91[G01B]
5042140 Process for making an apparatus utilizing a layered thin film structureExpiredApr 10, 90Aug 27, 91[G11B]
4969017 Measuring device for the measurement, in a wide range, of a non-reciprocal phase shift generated in a ring interferometer, and measuring methodExpiredJun 01, 89Nov 06, 90[G01B]

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