Unisys Corporation
2,451Patents
374Active
2,451Granted
51Portfolio score
Filing activity: Mar 17, 1969 → Oct 25, 2023 · 130 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5321816A | Local-remote apparatus with specialized image storage modules | Physics | 1,569 | Expired |
| US7222133B1 | Method for reducing database recovery time | Emerging Cross-Sectional Technologies | 1,355 | Expired |
| US6154787A | Grouping shared resources into one or more pools and automatically re-assigning shared resources from where they are not currently needed to where they are needed | Physics | 1,016 | Expired |
| US5583561A | Multi-cast digital video data server using synchronization groups | Emerging Cross-Sectional Technologies | 661 | Expired |
| US5911776A | Automatic format conversion system and publishing methodology for multi-user network | Emerging Cross-Sectional Technologies | 610 | Expired |
| US5864870A | Method for storing/retrieving files of various formats in an object database using a virtual multimedia file system | Emerging Cross-Sectional Technologies | 503 | Expired |
| US5315711A | Method and apparatus for remotely and centrally controlling a plurality of host processors | Physics | 433 | Expired |
| US5848415A | Selective multiple protocol transport and dynamic format conversion in a multi-user network | Emerging Cross-Sectional Technologies | 411 | Expired |
| US5187750A | Archival document image processing and printing system | Emerging Cross-Sectional Technologies | 410 | Expired |
| US6185316A | Self-authentication apparatus and method | Electricity | 402 | Expired |
| US6427230B1 | System and method for defining and managing reusable groups software constructs within an object management system | Physics | 360 | Expired |
| US5193162A | Cache memory with data compaction for use in the audit trail of a data processing system having record locking capabilities | Emerging Cross-Sectional Technologies | 357 | Expired |
| US6049776A | Human resource management system for staffing projects | Physics | 323 | Expired |
| US6785677B1 | Method for execution of query to search strings of characters that match pattern with a target string utilizing bit vector | Emerging Cross-Sectional Technologies | 308 | Expired |
| US5237158A | Image-based document processing system providing for priority document shipment | Physics | 296 | Expired |
| US4727354A | System for selecting best fit vector code in vector quantization encoding | Electricity | 274 | Expired |
| US6314501A | Computer system and method for operating multiple operating systems in different partitions of the computer system and for allowing the different partitions to communicate with one another through shared memory | Physics | 274 | Expired |
| US6611598B1 | Self-authentication of value documents using encoded indices | Physics | 270 | Expired |
| US5754772A | Transaction service independent HTTP server-to-transaction gateway | Electricity | 269 | Expired |
| US5633916A | Universal messaging service using single voice grade telephone line within a client/server architecture | Electricity | 252 | Expired |
| US4747041A | Automatic power control system which automatically activates and deactivates power to selected peripheral devices based upon system requirement | Emerging Cross-Sectional Technologies | 250 | Expired |
| US6453312B1 | System and method for developing a selectably-expandable concept-based search | Emerging Cross-Sectional Technologies | 243 | Expired |
| US6192418A | System and method for performing external procedure calls from a client program to a server program while both are operating in a heterogenous computer | Physics | 239 | Expired |
| US5021971A | Reflective binary encoder for vector quantization | Electricity | 238 | Expired |
| US5568423A | Flash memory wear leveling system providing immediate direct access to microprocessor | Physics | 227 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.