Assignee
TANDEM COMPUTERS INC
US312 patents
Top patents by PatentIndex Score
US5867501AFeb 2, 1999
Encoding for communicating data and commands
TANDEM COMPUTERS INC162 citations99
US5838894ANov 17, 1998
Logical, fail-functional, dual central processor units formed from three processor units
TANDEM COMPUTERS INC148 citations99
US5384906AJan 24, 1995
Method and apparatus for synchronizing a plurality of processors
TANDEM COMPUTERS INC145 citations99
US5317726AMay 31, 1994
Multiple-processor computer system with asynchronous execution of identical code streams
TANDEM COMPUTERS INC202 citations99
US5287472AFeb 15, 1994
Memory system using linear array wafer scale integration architecture
TANDEM COMPUTERS INC167 citations99
US6163834ADec 19, 2000
Two level address translation and memory registration system and method
TANDEM COMPUTERS INC96 citations98
US6151689ANov 21, 2000
Detecting and isolating errors occurring in data communication in a multiple processor system
TANDEM COMPUTERS INC168 citations98
US6145061ANov 7, 2000
Method of management of a circular queue for asynchronous access
TANDEM COMPUTERS INC89 citations98
US5914953AJun 22, 1999
Network message routing using routing table information and supplemental enable information for deadlock prevention
TANDEM COMPUTERS INC159 citations98
US5884328AMar 16, 1999
System and method for sychronizing a large database and its replica
TANDEM COMPUTERS INC162 citations98
US5822747AOct 13, 1998
System and method for optimizing database queries
TANDEM COMPUTERS INC278 citations98
US5819255AOct 6, 1998
System and method for database query optimization
TANDEM COMPUTERS INC198 citations98
US5745753AApr 28, 1998
Remote duplicate database facility with database replication support for online DDL operations
TANDEM COMPUTERS INC195 citations98
US5724570AMar 3, 1998
Method and apparatus for a complete SQL subquery elimination process
TANDEM COMPUTERS INC104 citations98
US5511190AApr 23, 1996
Hash-based database grouping system and method
TANDEM COMPUTERS INC269 citations98
US5388242AFeb 7, 1995
Multiprocessor system with each processor executing the same instruction sequence and hierarchical memory providing on demand page swapping
TANDEM COMPUTERS INC123 citations98
US5319710AJun 7, 1994
Method and means for combining and managing personal verification and message authentication encrytions for network transmission
TANDEM COMPUTERS INC161 citations98
US4965717AOct 23, 1990
Multiple processor system having shared memory with private-write capability
TANDEM COMPUTERS INC253 citations98
US4817091AMar 28, 1989
Fault-tolerant multiprocessor system
TANDEM COMPUTERS INC210 citations98
US4807116AFeb 21, 1989
Interprocessor communication
TANDEM COMPUTERS INC138 citations98
US4639864AJan 27, 1987
Power interlock system and method for use with multiprocessor systems
TANDEM COMPUTERS INC150 citations98
US4228496AOct 14, 1980
Multiprocessor system
TANDEM COMPUTERS INC432 citations98
US6031993AFeb 29, 2000
Method and apparatus for translating source code from one high-level computer language to another
TANDEM COMPUTERS INC220 citations97
US5964835AOct 12, 1999
Storage access validation to data messages using partial storage address data indexed entries containing permissible address range validation for message source
TANDEM COMPUTERS INC125 citations97
US5848159ADec 8, 1998
Public key cryptographic apparatus and method
TANDEM COMPUTERS INC168 citations97
US5768564AJun 16, 1998
Method and apparatus for translating source code from one high-level computer language to another
TANDEM COMPUTERS INC138 citations97
US5757918AMay 26, 1998
Method and apparatus for user and security device authentication
TANDEM COMPUTERS INC164 citations97
US5675807AOct 7, 1997
Interrupt message delivery identified by storage location of received interrupt data
TANDEM COMPUTERS INC146 citations97
US5588111ADec 24, 1996
Fault-tolerant computer system having switchable I/O bus interface modules
TANDEM COMPUTERS INC75 citations97
US5390355AFeb 14, 1995
Computer architecture capable of concurrent issuance and execution of general purpose multiple instructions
TANDEM COMPUTERS INC75 citations97
US5276823AJan 4, 1994
Fault-tolerant computer system with redesignation of peripheral processor
TANDEM COMPUTERS INC99 citations97
US5193175AMar 9, 1993
Fault-tolerant computer with three independently clocked processors asynchronously executing identical code that are synchronized upon each voted access to two memory modules
TANDEM COMPUTERS INC178 citations97
US4972472ANov 20, 1990
Method and apparatus for changing the master key in a cryptographic system
TANDEM COMPUTERS INC139 citations97
US4672537AJun 9, 1987
Data error detection and device controller failure detection in an input/output system
TANDEM COMPUTERS INC88 citations97
US4672535AJun 9, 1987
Multiprocessor system
TANDEM COMPUTERS INC124 citations97
US4667287AMay 19, 1987
Multiprocessor multisystem communications network
TANDEM COMPUTERS INC211 citations97
US4484275ANov 20, 1984
Multiprocessor system
TANDEM COMPUTERS INC115 citations97
US4378588AMar 29, 1983
Buffer control for a data path system
TANDEM COMPUTERS INC112 citations97
US4365295ADec 21, 1982
Multiprocessor system
TANDEM COMPUTERS INC102 citations97
US4356550AOct 26, 1982
Multiprocessor system
TANDEM COMPUTERS INC150 citations97
US5794252AAug 11, 1998
Remote duplicate database facility featuring safe master audit trail (safeMAT) checkpointing
TANDEM COMPUTERS INC187 citations96
US5790776AAug 4, 1998
Apparatus for detecting divergence between a pair of duplexed, synchronized processor elements
TANDEM COMPUTERS INC134 citations96
US5751932AMay 12, 1998
Fail-fast, fail-functional, fault-tolerant multiprocessor system
TANDEM COMPUTERS INC224 citations96
US5751955AMay 12, 1998
Method of synchronizing a pair of central processor units for duplex, lock-step operation by copying data into a corresponding locations of another memory
TANDEM COMPUTERS INC233 citations96
US5710549AJan 20, 1998
Routing arbitration for shared resources
TANDEM COMPUTERS INC64 citations96
US5689689ANov 18, 1997
Clock circuits for synchronized processor systems having clock generator circuit with a voltage control oscillator producing a clock signal synchronous with a master clock signal
TANDEM COMPUTERS INC121 citations96
US5574849ANov 12, 1996
Synchronized data transmission between elements of a processing system
TANDEM COMPUTERS INC194 citations96
US5574933ANov 12, 1996
Task flow computer architecture
TANDEM COMPUTERS INC66 citations96
US5404550AApr 4, 1995
Method and apparatus for executing tasks by following a linked list of memory packets
TANDEM COMPUTERS INC48 citations96
US5353436AOct 4, 1994
Method and apparatus for synchronizing a plurality of processors
TANDEM COMPUTERS INC39 citations96
Showing the top 50 of 312 patents by PatentIndex Score.