Control Data Corporation

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Patent Activity in the Last 10 Years


Intl Class Technology Matters Rank in Class

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5233686 Open systems software backplane architecture for federated execution of independent application programsSep 24, 91Aug 03, 93[G06F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5407763 Mask alignment mark systemExpiredMay 28, 92Apr 18, 95[G03F]
5305442 Generalized hierarchical architecture for bus adaptersExpiredMar 27, 92Apr 19, 94[G06F]
5261071 Dual pipe cache memory with out-of-order issue capabilityExpiredMar 21, 91Nov 09, 93[G06F]
5241638 Dual cache memoryExpiredAug 12, 85Aug 31, 93[G06F]
5208838 Clock signal multiplierExpiredMar 30, 90May 04, 93[H04L]
5161986 Low inductance circuit apparatus with controlled impedance cross-unders and connector for connecting to backpanelsExpiredOct 15, 91Nov 10, 92[H01R]
5153882 Serial scan diagnostics apparatus and method for a memory deviceExpiredMar 29, 90Oct 06, 92[G01R]
5067106 Radiation detection and signal delay circuitry for protecting recorded dataExpiredSep 05, 89Nov 19, 91[G06F]
5027355 Logic circuit and design method for improved testabilityExpiredApr 14, 89Jun 25, 91[G01R, G06F]
4999771 Communications networkExpiredAug 31, 87Mar 12, 91[G06F]
4970643 Mechanism for lock-up free cache operation with a remote address translation unitExpiredMay 10, 88Nov 13, 90[G06F]
4958214 Protective carrier for semiconductor packagesExpiredApr 22, 88Sep 18, 90[H01L]
4958371 Method and apparatus for determining when a telephone handset is off-hookExpiredApr 19, 88Sep 18, 90[H04M]
4941119 Method and apparatus for predicting an overflow in an integer multiplyExpiredNov 30, 88Jul 10, 90[G06F]
4931722 Flexible imbedded test system for VLSI circuitsExpiredMar 23, 89Jun 05, 90[G01R, G06F]
4922184 Apparatus and process for the simultaneous continuity sensing of multiple circuitsExpiredAug 29, 88May 01, 90[G01R]
4922434 Linear interpolation for a component placement robotExpiredJun 16, 88May 01, 90[G06F]
4912709 Flexible VLSI on-chip maintenance and test system with unit I/O cell designExpiredOct 23, 87Mar 27, 90[G01R]
4905371 Method for cleaning process controlExpiredAug 26, 88Mar 06, 90[H05K]
4897764 Conductive cooling cup moduleExpiredOct 31, 88Jan 30, 90[H01L]

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