Control Data Corporation
211Patents
0Active
211Granted
43Portfolio score
Filing activity: Jun 26, 1972 → Jul 23, 1991
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4816904A | Television and market research data collection system and method | Electricity | 558 | Expired |
| US4739398A | Method, apparatus and system for recognizing broadcast segments | Electricity | 558 | Expired |
| US5019899A | Electronic data encoding and recognition system | Electricity | 321 | Expired |
| US4912552A | Distributed monitoring system | Electricity | 296 | Expired |
| US5740035A | Self-administered survey systems, methods and devices | Physics | 257 | Expired |
| US4044376A | TV monitor | Electricity | 173 | Expired |
| US4626904A | Meter for passively logging the presence and identity of TV viewers | Electricity | 169 | Expired |
| US4613904A | Television monitoring device | Electricity | 162 | Expired |
| US4357703A | Test system for LSI circuits resident on LSI chips | Physics | 132 | Expired |
| US4085302A | Membrane-type touch panel | Electricity | 131 | Expired |
| US4779198A | Audience monitoring system | Electricity | 130 | Expired |
| US4512161A | Dew point sensitive computer cooling system | Physics | 122 | Expired |
| US4527249A | Simulator system for logic design validation | Physics | 111 | Expired |
| US4482937A | Board to board interconnect structure | Electricity | 106 | Expired |
| US4066855A | Vented membrane-type touch panel | Electricity | 103 | Expired |
| US4058829A | TV monitor | Electricity | 98 | Expired |
| US4200794A | Micro lens array and micro deflector assembly for fly's eye electron beam tubes using silicon components and techniques of fabrication and assembly | Electricity | 90 | Expired |
| US4337463A | Time synchronization master station and remote station system | Electricity | 80 | Expired |
| US5235414A | Non-obtrusive programming monitor | Electricity | 79 | Expired |
| US3990068A | Plasma display panel drive system | Electricity | 72 | Expired |
| US4037270A | Circuit packaging and cooling | Electricity | 64 | Expired |
| US4912709A | Flexible VLSI on-chip maintenance and test system with unit I/O cell design | Physics | 64 | Expired |
| US3964050A | Plasma display panel | Physics | 63 | Expired |
| US4073005A | Multi-processor computer system | Physics | 63 | Expired |
| US4734041A | Electrical power connector | Electricity | 62 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.