Data General Corporation
312Patents
1Active
312Granted
43Portfolio score
Filing activity: Dec 5, 1973 → Jul 28, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5745778A | Apparatus and method for improved CPU affinity in a multiprocessor system | Physics | 330 | Expired |
| US5859966A | Security system for computer systems | Emerging Cross-Sectional Technologies | 299 | Expired |
| US4525780A | Data processing system having a memory using object-based information and a protection scheme for determining access rights to such information | Physics | 271 | Expired |
| US5535381A | Apparatus and method for copying and restoring disk files | Physics | 195 | Expired |
| US4920483A | A computer memory for accessing any word-sized group of contiguous bits | Physics | 167 | Expired |
| US6324692A | Upgrade of a program | Physics | 163 | Expired |
| US5305326A | High availability disk arrays | Physics | 154 | Expired |
| US4829427A | Database query code generation and optimization based on the cost of alternate access methods | Emerging Cross-Sectional Technologies | 147 | Expired |
| US4825403A | Apparatus guaranteeing that a controller in a disk drive system receives at least some data from an invalid track sector | Physics | 138 | Expired |
| US5287537A | Distributed processing system having plural computers each using identical retaining information to identify another computer for executing a received command | Physics | 137 | Expired |
| US5937159A | Secure computer system | Physics | 134 | Expired |
| US5887146A | Symmetric multiprocessing computer with non-uniform memory access architecture | Physics | 123 | Expired |
| US5809256A | Soft power switching for hot installation and removal of circuit boards in a computer system | Physics | 121 | Expired |
| US6026461A | Bus arbitration system for multiprocessor architecture | Physics | 120 | Expired |
| US4742478A | Housing for a portable computer | Electricity | 117 | Expired |
| US5922077A | Fail-over switching system | Physics | 113 | Expired |
| US4455602A | Digital data processing system having an I/O means using unique address providing and access priority control techniques | Physics | 112 | Expired |
| US4445177A | Digital data processing system utilizing a unique arithmetic logic unit for handling uniquely identifiable addresses for operands and instructions | Physics | 112 | Expired |
| US5666486A | Multiprocessor cluster membership manager framework | Physics | 106 | Expired |
| US4493027A | Method of performing a call operation in a digital data processing system having microcode call and return operations | Physics | 100 | Expired |
| US4356545A | Apparatus for monitoring and/or controlling the operations of a computer from a remote location | Physics | 96 | Expired |
| US4056642A | Method of fabricating metal-semiconductor interfaces | Emerging Cross-Sectional Technologies | 95 | Expired |
| US4514800A | Digital computer system including apparatus for resolving names representing data items and capable of executing instructions belonging to general instruction sets | Physics | 94 | Expired |
| US4901232A | I/O controller for controlling the sequencing of execution of I/O commands and for permitting modification of I/O controller operation by a host processor | Physics | 93 | Expired |
| US5247427A | Disk array subsystem having elongated T-shaped guides for use in a data processing system | Electricity | 86 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.