SCHLUMBERGER SYSTEMS AND SERVICES, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE31056 Computer controlled high-speed circuit for testing electronic devicesMay 28, 80Oct 12, 82[G01R]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5119444 System for expedited computation of laplacian and gaussian filters and correlation of their outputs for image processingExpiredJul 22, 86Jun 02, 92[G06K]
4965842 Method and apparatus for measuring feature dimensions using controlled dark-field illuminationExpiredDec 14, 87Oct 23, 90[G06K]
4924506 Method for directly measuring area and volume using binocular stereo visionExpiredNov 05, 87May 08, 90[G06K]
4905296 System for shape recognitionExpiredMar 18, 88Feb 27, 90[G06K]
4864160 Timing signal generatorExpiredSep 04, 87Sep 05, 89[H03K, G04F, G01R]
4864228 Electron beam test probe for integrated circuit testingExpiredAug 16, 85Sep 05, 89[G01R]
4837521 Delay line control system for automatic test equipmentExpiredDec 21, 87Jun 06, 89[H03K, G06K]
4833631 System for parameter identification of analog signalsExpiredApr 10, 87May 23, 89[G01R, G06J]
4820944 Method and apparatus for dynamically controlling the timing of signals in automatic test systemsExpiredOct 28, 86Apr 11, 89[H03K]
4817175 Video stream processing systemExpiredMay 04, 87Mar 28, 89[G06K]
4814698 Technique for elimination of static in printed circuit board test fixturesExpiredOct 14, 87Mar 21, 89[G01R, H05K]
4800431 Video stream processing frame buffer controllerExpiredJul 29, 86Jan 24, 89[H04N]
4795984 Multi-marker, multi-destination timing signal generatorExpiredNov 19, 86Jan 03, 89[H03K, H03M]
4796227 Computer memory systemExpiredMar 17, 87Jan 03, 89[G11C]
4791675 VSP Connectivity pattern recognition systemExpiredDec 31, 85Dec 13, 88[G06K]
4775852 Apparatus for compensating digital to analog converter errorsExpiredJul 13, 87Oct 04, 88[H03M]
4763288 System for simulating electronic digital circuitsExpiredDec 31, 85Aug 09, 88[G06F, G06G]
4754412 Arithmetic logic system using the output of a first alu to control the operation of a second aluExpiredOct 07, 85Jun 28, 88[G06F]
4748439 Memory apparatus and method for retrieving sequences of symbols including variable elementsExpiredAug 13, 85May 31, 88[G06F]
4747072 Pattern addressable memoryExpiredAug 13, 85May 24, 88[G06F]

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