DIGITAL EQUIPMENT CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 10437
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 3282
 
  
 
H05K PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS 3153
 
  
 
G11B INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER 2136
 
  
 
G03C PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES 145
 
  
 
H01M PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 1153

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7596563 Computerized file system and methodOct 28, 99Sep 29, 09[G06F]
6563837 Method and apparatus for providing work-conserving properties in a non-blocking switch with limited speedup independent of switch sizeFeb 10, 98May 13, 03[H04L]
6279078 Apparatus and method for synchronizing a cache mode in a dual controller, dual cache memory system operating in a plurality of cache modesJun 28, 96Aug 21, 01[G06F]
6260068 Method and apparatus for migrating resources in a multi-processor computer systemJun 10, 98Jul 10, 01[G06F]
6219248 Heat sink alignment apparatus and methodApr 23, 99Apr 17, 01[H05K]
6209065 Mechanism for optimizing generation of commit-signals in a distributed shared-memory systemOct 24, 97Mar 27, 01[G06F]
6195698 Method for selectively restricting access to computer systemsApr 13, 98Feb 27, 01[G06F]
6185663 Computer method and apparatus for file system block allocation with multiple redoJun 15, 98Feb 06, 01[G06F]
6141760 System and method for generating unique passwordsOct 31, 97Oct 31, 00[H04L]
6115814 Memory paging scheme for 8051 class microcontrollersNov 14, 97Sep 05, 00[G06F]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6618256 Guide system for a removable electronic device in a computer bayExpiredJun 10, 98Sep 09, 03[G06F]
6321349 Method and apparatus for developing and debugging portable computers via a peripheral interface slotExpiredJun 30, 98Nov 20, 01[G06F]
6240500 Method for dynamically placing procedures of a program in a memoryExpiredJun 08, 98May 29, 01[G06F]
6101570 Method and apparatus for fair bus arbitration in multiple initiator SCSI systemsExpiredJul 28, 98Aug 08, 00[G06F]
5986943 Semiconductor memory device for shortening the set up time and hold time of control signals in synchronous DRAMExpiredNov 22, 96Nov 16, 99[G11C]
5845917 Telescopic handle for a strollerExpiredNov 06, 96Dec 08, 98[B62B]
5745297 Retrofocus lens systemExpiredJul 11, 96Apr 28, 98[G02B]
5615382 Data transfer system for buffering and selectively manipulating the size of data blocks being transferred between a processor and a system bus of a computer systemExpiredJun 06, 95Mar 25, 97[G06F]
5594927 Apparatus and method for aligning data transferred via DMA using a barrel shifter and a buffer comprising of byte-wide, individually addressabe FIFO circuitsExpiredSep 15, 94Jan 14, 97[G06F]
5539345 Phase detector apparatusExpiredDec 30, 92Jul 23, 96[H03L]
5532918 High power factor switched DC power supplyExpiredApr 14, 94Jul 02, 96[H02M]
5523603 Semiconductor device with reduced time-dependent dielectric failuresExpiredJun 07, 95Jun 04, 96[H01L]
5516006 Nasal dispenserExpiredJul 30, 93May 14, 96[B67D]
5508822 Imaging system with multilevel dithering using single memoryExpiredOct 15, 92Apr 16, 96[H04N]
5500583 Methods for extending the cycle life of solid, secondary electrolytic cells during recharge of the electrolytic cellsExpiredAug 13, 93Mar 19, 96[H02J]
5498965 Driving point reference plane time domain reflectometry method for measuring characteristic impedanceExpiredDec 15, 93Mar 12, 96[G01R]
5494857 Chemical mechanical planarization of shallow trenches in semiconductor substratesExpiredJul 28, 93Feb 27, 96[H01L]
5495447 Method and apparatus using mapped redundancy to perform multiple large block memory array repairExpiredNov 18, 94Feb 27, 96[G11C]
5492858 Shallow trench isolation process for high aspect ratio trenchesExpiredApr 20, 94Feb 20, 96[H01L]
5490100 Cumulative summation unitExpiredJan 04, 94Feb 06, 96[G06F]

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