Zenith Data Systems Corporation
59Patents
0Active
59Granted
39Portfolio score
Filing activity: Oct 30, 1987 → Mar 13, 1996
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5446904A | Suspend/resume capability for a protected mode microprocessor | Emerging Cross-Sectional Technologies | 247 | Expired |
| US5045960A | Self-aligning guide and track for removable disk drive module | Electricity | 104 | Expired |
| US5146578A | Method of varying the amount of data prefetched to a cache memory in dependence on the history of data requests | Physics | 103 | Expired |
| US5517648A | Symmetric multiprocessing system with unified environment and distributed system functions | Physics | 83 | Expired |
| US5280621A | Personal computer having dedicated processors for peripheral devices interconnected to the CPU by way of a system control processor | Physics | 83 | Expired |
| US5027294A | Method and apparatus for battery-power management using load-compensation monitoring of battery discharge | Emerging Cross-Sectional Technologies | 81 | Expired |
| US5010426A | Installation mechanism for removable computer drive module | Electricity | 80 | Expired |
| US4982303A | Removable hard disk drive having a combination latch, lever and handle | Emerging Cross-Sectional Technologies | 74 | Expired |
| US4933910A | Method for improving the page hit ratio of a page mode main memory system | Physics | 70 | Expired |
| US4980848A | Heat-exchange panel for portable computer | Physics | 67 | Expired |
| US5541490A | Computer power supply system | Emerging Cross-Sectional Technologies | 63 | Expired |
| US5460547A | Port replicator | Electricity | 62 | Expired |
| US5257143A | Method and apparatus for positioning head of disk drive using zone-bit-recording | Physics | 60 | Expired |
| USD385857S | Portable remote interface device | General | 58 | Expired |
| US5303171A | System suspend on lid close and system resume on lid open | Emerging Cross-Sectional Technologies | 58 | Expired |
| US5551033A | Apparatus for maintaining one interrupt mask register in conformity with another in a manner invisible to an executing program | Emerging Cross-Sectional Technologies | 43 | Expired |
| US5561361A | Computer power supply and battery recharging system | Emerging Cross-Sectional Technologies | 43 | Expired |
| US5297270A | Programmable cache memory which associates each section of main memory to be cached with a status bit which enables/disables the caching accessibility of the particular section, and with the capability of functioning with memory areas of varying size | Physics | 40 | Expired |
| US5566383A | Drive platform assembly with rotatable mounting brackets and automatic grounding bracket | Physics | 38 | Expired |
| US5569052A | Computer for use with a port replicator | Electricity | 38 | Expired |
| US5129069A | Method and apparatus for automatic memory configuration by a computer | Physics | 38 | Expired |
| US5123092A | External expansion bus interface | Physics | 34 | Expired |
| US4949934A | Computer stand | Emerging Cross-Sectional Technologies | 34 | Expired |
| US5136694A | Method and apparatus facilitating communication between two keyboards and a single processor | Physics | 33 | Expired |
| US5596480A | Split rotatable keyboard | Physics | 33 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.