Digital Equipment Corporation
2,306Patents
0Active
2,306Granted
50Portfolio score
Filing activity: Nov 5, 1973 → Sep 23, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5774643A | Enhanced raid write hole protection and recovery | Physics | 1,543 | Expired |
| US5347653A | System for reconstructing prior versions of indexes using records indicating changes between successive versions of the indexes | Emerging Cross-Sectional Technologies | 1,524 | Expired |
| US5005122A | Arrangement with cooperating management server node and network service node | Electricity | 1,520 | Expired |
| US5287500A | System for allocating storage spaces based upon required and optional service attributes having assigned piorities | Emerging Cross-Sectional Technologies | 1,354 | Expired |
| US5333315A | System of device independent file directories using a tag between the directories and file descriptors that migrate with the files | Emerging Cross-Sectional Technologies | 1,123 | Expired |
| US5758359A | Method and apparatus for performing retroactive backups in a computer system | Physics | 1,107 | Expired |
| US5341477A | Broker for computer network server selection | Electricity | 817 | Expired |
| US5260999A | Filters in license management system | Physics | 773 | Expired |
| US5204897A | Management interface for license management system | Physics | 755 | Expired |
| US5377354A | Method and system for sorting and prioritizing electronic mail messages | Electricity | 750 | Expired |
| US5414455A | Segmented video on demand system | Electricity | 616 | Expired |
| US5357427A | Remote monitoring of high-risk patients using artificial intelligence | Emerging Cross-Sectional Technologies | 577 | Expired |
| US6009210A | Hands-free interface to a virtual reality environment using head tracking | Human Necessities | 562 | Expired |
| US5586260A | Method and apparatus for authenticating a client to a server in computer systems which support different security mechanisms | Electricity | 538 | Expired |
| US5442390A | Video on demand with memory accessing and or like functions | Electricity | 532 | Expired |
| US5235642A | Access control subsystem and method for distributed computer system using locally cached authentication credentials | Physics | 498 | Expired |
| US5745879A | Method and system for managing execution of licensed programs | Physics | 496 | Expired |
| US5933598A | Method for sharing variable-grained memory of workstations by sending particular block including line and size of the block to exchange shared data structures | Physics | 496 | Expired |
| US6243761A | Method for dynamically adjusting multimedia content of a web page by a server in accordance to network path characteristics between client and server | Electricity | 473 | Expired |
| US5438508A | License document interchange format for license management system | Physics | 447 | Expired |
| US5390327A | Method for on-line reorganization of the data on a RAID-4 or RAID-5 array in the absence of one disk and the on-line restoration of a replacement disk | Physics | 441 | Expired |
| US5220674A | Local area print server for requesting and storing required resource data and forwarding printer status message to selected destination | Physics | 433 | Expired |
| US5459837A | System to facilitate efficient utilization of network resources in a computer network | Electricity | 430 | Expired |
| US5652615A | Precision broadcast of composite programs including secondary program content such as advertisements | Electricity | 428 | Expired |
| US5414704A | Address lookup in packet data communications link, using hashing and content-addressable memory | Emerging Cross-Sectional Technologies | 426 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.