3054560
3303474
3444528
3533082
3544477
3557315
3602900
3623014
3636331
3665173
More ...
3681578
3725861
3735356
3754211
3760364
3761884
3771137
3803568
3810119
3810121
3812469
3820085
3824547
3828321
3864670
3865999
3889237
Highly available computer system
Patent #: 3959638
Issued on: 05/25/1976
Inventor: Blum , et al.
Computer redundancy interface
Patent #: 3991407
Issued on: 11/09/1976
Inventor: Jordan, Jr. , et al.
Bi-processor data handling system including automatic control of exchanges with external equipment and automatically activated maintenance operation
Patent #: 4012717
Issued on: 03/15/1977
Inventor: Censier , et al.
Management table apparatus in memory hierarchy system
Patent #: 4051461
Issued on: 09/27/1977
Inventor: Hashimoto , et al.
Multi-processor computer system
Patent #: 4073005
Issued on: 02/07/1978
Inventor: Parkin
Automatic switching unit for data communications network
Patent #: 4076961
Issued on: 02/28/1978
Inventor: Holsinger , et al.
Apparatus for facilitating a cooperation between an executive computer and a reserve computer
Patent #: 4099241
Issued on: 07/04/1978
Inventor: Ossfeldt
Digital controller system
Patent #: 4118772
Issued on: 10/03/1978
Inventor: Takada
Process control system with backup process controller
Patent #: 4141066
Issued on: 02/20/1979
Inventor: Keiles
Floating-priority storage control for processors in a multi-processor system
Patent #: 4152764
Issued on: 05/01/1979
Inventor: Connors , et al.
Projection unit having removable retention member
Patent #: 4156901
Issued on: 05/29/1979
Inventor: Haraden , et al.
Journal back-up storage control for a data processing system
Patent #: 4159517
Issued on: 06/26/1979
Inventor: Paradine , et al.
Computer systems
Patent #: 4164017
Issued on: 08/07/1979
Inventor: Randell , et al.
Self-configurable computer and memory system
Patent #: 4191996
Issued on: 03/04/1980
Inventor: Chesley
Dual data processing system
Patent #: 4208715
Issued on: 06/17/1980
Inventor: Kumahara , et al.
Multiplexed directory for dedicated cache memory system
Patent #: 4228503
Issued on: 10/14/1980
Inventor: Waite , et al.
Inhibit circuit for a differential amplifier
Patent #: 4257009
Issued on: 03/17/1981
Inventor: Yorkanis
Apparatus and method for cooperative and concurrent coprocessing of digital information
Patent #: 4270167
Issued on: 05/26/1981
Inventor: Koehler , et al.
Multiprocessor memory access system
Patent #: 4282572
Issued on: 08/04/1981
Inventor: Moore, III , et al.
Scheduler for a multiple computer system
Patent #: 4318173
Issued on: 03/02/1982
Inventor: Freedman , et al.
Local area contention network data communication system
Patent #: 4332027
Issued on: 05/25/1982
Inventor: Malcolm , et al.
Process control system with improved system security features
Patent #: 4351023
Issued on: 09/21/1982
Inventor: Richer
Double redundant processor
Patent #: 4358823
Issued on: 11/09/1982
Inventor: McDonald , et al.
Device for switching two digital trains
Patent #: 4359718
Issued on: 11/16/1982
Inventor: Payen
Automatic fault recovery system for a multiple processor telecommunications switching control
Patent #: 4371754
Issued on: 02/01/1983
Inventor: De , et al.
Buffer control for a data path system
Patent #: 4378588
Issued on: 03/29/1983
Inventor: Katzman , et al.
Interface apparatus employing a video tape drive to back-up a disc drive and including error detecting and correcting circuitry
Patent #: 4380047
Issued on: 04/12/1983
Inventor: Eisenhard , et al.
Error control in a hierarchical system
Patent #: 4380067
Issued on: 04/12/1983
Inventor: Beardsley , et al.
Interprocessor communication system
Patent #: 4402046
Issued on: 08/30/1983
Inventor: Cox , et al.
Balancing data-processing work loads
Patent #: 4403286
Issued on: 09/06/1983
Inventor: Fry , et al.
Terminal configuration manager
Patent #: 4403303
Issued on: 09/06/1983
Inventor: Howes , et al.
System and method for name-lookup in a local area network data communication system
Patent #: 4423414
Issued on: 12/27/1983
Inventor: Bryant , et al.
Peripheral unit controller
Patent #: 4428044
Issued on: 01/24/1984
Inventor: Liron
Distributed data processing system
Patent #: 4430699
Issued on: 02/07/1984
Inventor: Segarra , et al.
Disk format for secondary storage system
Patent #: 4434487
Issued on: 02/28/1984
Inventor: Rubinson , et al.
Method and system for retransmitting incorrectly received numbered frames in a data transmission system
Patent #: 4439859
Issued on: 03/27/1984
Inventor: Donnan
Method of controlling message transmission sequence in multi station communication system
Patent #: 4445214
Issued on: 04/24/1984
Inventor: Reynolds , et al.
Central processing apparatus for fault-tolerant computing
Patent #: 4453215
Issued on: 06/05/1984
Inventor: Reid
Cross checking among service processors in a multiprocessor system
Patent #: 4455601
Issued on: 06/19/1984
Inventor: Griscom , et al.
Back-up control system implemented with a redundancy scheme for protection against failure
Patent #: 4455645
Issued on: 06/19/1984
Inventor: Mijioka , et al.
Technique for enabling operation of a computer system with a consistent state of a linked list data structure after a main memory failure
Patent #: 4459658
Issued on: 07/10/1984
Inventor: Gabbe , et al.
Apparatus for cache clearing
Patent #: 4471429
Issued on: 09/11/1984
Inventor: Porter , et al.
Communications network for programmable controllers
Patent #: 4477882
Issued on: 10/16/1984
Inventor: Schumacher , et al.
Synchronized protection switching arrangement
Patent #: 4477895
Issued on: 10/16/1984
Inventor: Casper , et al.
System for updating error map of fault tolerant memory
Patent #: 4479214
Issued on: 10/23/1984
Inventor: Ryan
Method and means for the retention of locks across system, subsystem, and communication failures in a multiprocessing, multiprogramming, shared data environment
Patent #: 4480304
Issued on: 10/30/1984
Inventor: Carr , et al.
Online realignment of memory faults
Patent #: 4483001
Issued on: 11/13/1984
Inventor: Ryan
Multiprocessor system
Patent #: 4484275
Issued on: 11/20/1984
Inventor: Katzman , et al.
Computer peripheral control apparatus
Patent #: 4486826
Issued on: 12/04/1984
Inventor: Wolff , et al.
Method for assuring atomicity of multi-row update operations in a database system
Patent #: 4498145
Issued on: 02/05/1985
Inventor: Baker , et al.
Method and apparatus for logging journal data using a log write ahead data set
Patent #: 4507751
Issued on: 03/26/1985
Inventor: Gawlick , et al.
Transmission control system
Patent #: 4516121
Issued on: 05/07/1985
Inventor: Moriyama , et al.
Control system job recovery after a malfunction
Patent #: 4521847
Issued on: 06/04/1985
Inventor: Ziehm , et al.
Program process execution in a distributed multiprocessor system
Patent #: 4530051
Issued on: 07/16/1985
Inventor: Johnson , et al.
Apparatus and method for a data processing unit sharing a plurality of operating systems
Patent #: 4530052
Issued on: 07/16/1985
Inventor: King , et al.
Self-configuring digital processor system with global system
Patent #: 4562535
Issued on: 12/31/1985
Inventor: Vincent , et al.
Monitoring plural process control stations
Patent #: 4581701
Issued on: 04/08/1986
Inventor: Hess , et al.
Distributed computer control system with variable monitor timers
Patent #: 4583089
Issued on: 04/15/1986
Inventor: Cope
Remote processor crash recovery
Patent #: 4589090
Issued on: 05/13/1986
Inventor: Downing , et al.
Backup fault tolerant computer system
Patent #: 4590554
Issued on: 05/20/1986
Inventor: Glazer , et al.
Dynamic configuration for added devices
Patent #: 4604690
Issued on: 08/05/1986
Inventor: Crabtree , et al.
Fault-tolerant communications controller system
Patent #: 4607365
Issued on: 08/19/1986
Inventor: Greig , et al.
Processing system tolerant of loss of access to secondary storage
Patent #: 4608688
Issued on: 08/26/1986
Inventor: Hansen , et al.
Remote multiplexer terminal with redundant central processor units
Patent #: 4610013
Issued on: 09/02/1986
Inventor: Long , et al.
Queuing arrangement for initiating execution of multistage transactions
Patent #: 4615001
Issued on: 09/30/1986
Inventor: Hudgins, Jr.
Automatic communications switch
Patent #: 4623883
Issued on: 11/18/1986
Inventor: Konen
Computer of processor control systems
Patent #: 4628508
Issued on: 12/09/1986
Inventor: Sager , et al.
Automation initialization of reconfigurable on-line automatic test system
Patent #: 4630224
Issued on: 12/16/1986
Inventor: Sollman
Process control system
Patent #: 4639852
Issued on: 01/27/1987
Inventor: Motomiya
Dual stream processor apparatus
Patent #: 4639856
Issued on: 01/27/1987
Inventor: Hrustich , et al.
Non-unique names for broadcast messages
Patent #: 4644470
Issued on: 02/17/1987
Inventor: Feigenbaum , et al.
Communications method
Patent #: 4646300
Issued on: 02/24/1987
Inventor: Goodman , et al.
Method and apparatus for restarting a computing system
Patent #: 4648031
Issued on: 03/03/1987
Inventor: Jenner
Electronic document distribution network with dynamic document interchange protocol generation
Patent #: 4648061
Issued on: 03/03/1987
Inventor: Foster
Method of identifying magnetic tape as tape for journal
Patent #: 4652940
Issued on: 03/24/1987
Inventor: Sumiyoshi
Memory back-up system
Patent #: 4654819
Issued on: 03/31/1987
Inventor: Stiffler , et al.
Spacecraft autonomous redundancy control
Patent #: 4654846
Issued on: 03/31/1987
Inventor: Goodwin , et al.
Digital data processor with high reliability
Patent #: 4654857
Issued on: 03/31/1987
Inventor: Samson , et al.
Video memory controller
Patent #: 4656596
Issued on: 04/07/1987
Inventor: Thaden , et al.
Recovery of guest virtual machines after failure of a host real machine
Patent #: 4674038
Issued on: 06/16/1987
Inventor: Brelsford , et al.
Local area network special function frames
Patent #: 4680581
Issued on: 07/14/1987
Inventor: Kozlik , et al.
Method and apparatus for transmitting data in adjustable-sized packets
Patent #: 4691314
Issued on: 09/01/1987
Inventor: Bergins , et al.
Ready line synchronization circuit for use in a duplicated computer system
Patent #: 4703421
Issued on: 10/27/1987
Inventor: Abrant , et al.
Method and apparatus for fault recovery within a computing system
Patent #: 4703481
Issued on: 10/27/1987
Inventor: Fremont
Automatic mode switching unit for a serial communications data system
Patent #: 4713811
Issued on: 12/15/1987
Inventor: Frey
Semiconductor memory device having redundancy means
Patent #: 4727516
Issued on: 02/23/1988
Inventor: Yoshida , et al.
Memory integrity checking system for a gaming device
Patent #: 4727544
Issued on: 02/23/1988
Inventor: Brunner , et al.
Circuit for simplex I/O terminal control by duplex processors
Patent #: 4736339
Issued on: 04/05/1988
Inventor: Crabbe, Jr.
Method and apparatus for recovering from hardware faults
Patent #: 4740969
Issued on: 04/26/1988
Inventor: Fremont
Digital data processor apparatus with pipelined fault tolerant bus protocol
Patent #: 4750177
Issued on: 06/07/1988
Inventor: Hendrie , et al.
Fault tolerant modular subsystems for computers
Patent #: 4754397
Issued on: 06/28/1988
Inventor: Varaiya , et al.
Self-testing memory
Patent #: 4782486
Issued on: 11/01/1988
Inventor: Lipcon , et al.
Method of propagating resource information in a computer network
Patent #: 4800488
Issued on: 01/24/1989
Inventor: Agrawal , et al.
Reconfigurable dual processor system
Patent #: 4823256
Issued on: 04/18/1989
Inventor: Bishop , et al.
Secure messaging systems
Patent #: 4866707
Issued on: 09/12/1989
Inventor: Marshall , et al.
Method for managing reuse of hard log space by mapping log data during state changes and discarding the log data
Patent #: 4878167
Issued on: 10/31/1989
Inventor: Kapulka, et al.
System for bumpless changeover between active units and backup units by establishing rollback points and logging write and read operations
Patent #: 4941087
Issued on: 07/10/1990
Inventor: Kap
Pseudo-erasable and rewritable write-once optical disk memory system
Patent #: 4953122
Issued on: 08/28/1990
Inventor: Williams
Apparatus for tracking predetermined data for updating a secondary data base
Patent #: 4959768
Issued on: 09/25/1990
Inventor: Gerhart
Shadow memory system for storing variable backup blocks in consecutive time periods
Patent #: 4959774
Issued on: 09/25/1990
Inventor: Davis
Task synchronization arrangement and method for remote duplex processors
Patent #: 4979108
Issued on: 12/18/1990
Inventor: Crabbe, Jr.
Arrangement with cooperating management server node and network service node
Patent #: 5005122
Issued on: 04/02/1991
Inventor: Griffin, et al.
Cache with at least two fill rates
Patent #: 5038278
Issued on: 08/06/1991
Inventor: Steely, Jr., et al.
Memory device with transfer of ECC signals on time division multiplexed bidirectional lines
Patent #: 5048022
Issued on: 09/10/1991
Inventor: Bissett, et al.
File backup system
Patent #: 5060185
Issued on: 10/22/1991
Inventor: Naito, ;, , , --> Naito, et al.
Apparatus and method for documenting faults in computing modules
Patent #: 5068851
Issued on: 11/26/1991
Inventor: Bruckert, et al.
System and method of providing an automatic back-up primary terminal for a cluster of secondary terminals
Patent #: 5079740
Issued on: 01/07/1992
Inventor: Patel, et al.
Method of operating a data processing system
Patent #: 5086502
Issued on: 02/04/1992
Inventor: Malcolm
Method and apparatus for improved disk access
Patent #: 5088081
Issued on: 02/11/1992
Inventor: Farr
Fault tolerant computer backup system
Patent #: 5089958
Issued on: 02/18/1992
Inventor: Horton, et al.
Hot standby memory copy system
Patent #: 5123099
Issued on: 06/16/1992
Inventor: Shibata, et al.
Fault tolerant computer system
Patent #: 5157663
Issued on: 10/20/1992
Inventor: Major, et al.
File backup system for producing a backup copy of a file which may be updated during backup
Patent #: 5163148
Issued on: 11/10/1992
Inventor: Walls
Method and apparatus for error recovery in arrays
Patent #: 5177744
Issued on: 01/05/1993
Inventor: Cesare, et al.
Checkpointing mechanism for fault-tolerant systems
Patent #: 5235700
Issued on: 08/10/1993
Inventor: Alaiwan, et al.
Method and system for automated backup copy ordering in a time zero backup copy session
Patent #: 5241670
Issued on: 08/31/1993
Inventor: Eastridge, et al.
Digital data storage system with improved data migration
Patent #: 5276867
Issued on: 01/04/1994
Inventor: Kenley, et al.
Method of handling errors in software
Patent #: 5291494
Issued on: 03/01/1994
Inventor: Bruckert, et al.
Fault-tolerant computer system with online recovery and reintegration of redundant components
Patent #: 5295258
Issued on: 03/15/1994
Inventor: Jewett, et al.
Highly reliable online system
Patent #: 5307481
Issued on: 04/26/1994
Inventor: Shimazaki, et al.
Data processing system with data transmission failure recovery measures
Patent #: 5343477
Issued on: 08/30/1994
Inventor: Yamada
File server having snapshot application data groups
Patent #: 5403639
Issued on: 04/04/1995
Inventor: Belsan, et al.
Data record copy system for a disk drive array data storage subsystem
Patent #: 5410667
Issued on: 04/25/1995
Inventor: Belsan, et al.
Method and apparatus for virtual memory mapping and transaction management in an object-oriented database system
Patent #: 5426747
Issued on: 06/20/1995
Inventor: Weinreb, et al.
Computerized system and method for data backup
Patent #: 5435004
Issued on: 07/18/1995
Inventor: Cox, et al.
Data processing system using fligh availability disk arrays for handling power failure conditions during operation of the system
Patent #: 5452444
Issued on: 09/19/1995
Inventor: Solomon, et al.
Fault tolerant computer system
Patent #: 5455932
Issued on: 10/03/1995
Inventor: Major, et al.
Fault tolerant NFS server system and mirroring protocol
Patent #: 5513314
Issued on: 04/30/1996
Inventor: Kandasamy, et al.
Data backup system with methods for stripe affinity backup to multiple archive devices
Patent #: 5515502
Issued on: 05/07/1996
Inventor: Wood
Replicating a database by the sequential application of hierarchically sorted log records
Patent #: 5530855
Issued on: 06/25/1996
Inventor: Satoh, et al.
System and method for remote mirroring of digital data from a primary network server to a remote network server
Patent #: 5537533
Issued on: 07/16/1996
Inventor: Staheli, et al.
Data storage management for network interconnected processors
Patent #: 5537585
Issued on: 07/16/1996
Inventor: Blickenstaff, et al.
Data storage system controlled remote data mirroring with respectively maintained data indices
Patent #: 5544347
Issued on: 08/06/1996
Inventor: Yanai, et al.
System and method for distributed storage management on networked computer systems using binary object identifiers
Patent #: 5649196
Issued on: 07/15/1997
Inventor: Woodhill, et al.
5664186
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 Patent #: 5689689
Issued on: 11/18/1997
Inventor: Meyers, et al.
November 8, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
