Tandy Corporation
131Patents
0Active
131Granted
43Portfolio score
Filing activity: Jan 10, 1974 → Feb 18, 1997
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5103498A | Intelligent help system | Emerging Cross-Sectional Technologies | 295 | Expired |
| US5434394A | Automated order and delivery system | Physics | 262 | Expired |
| US4825200A | Reconfigurable remote control transmitter | Electricity | 261 | Expired |
| US5310997A | Automated order and delivery system | Physics | 245 | Expired |
| US5029982A | LCD contrast adjustment system | Physics | 207 | Expired |
| US5424903A | Intelligent power switcher | Emerging Cross-Sectional Technologies | 154 | Expired |
| US4894792A | Portable computer with removable and replaceable add-on modules | Physics | 147 | Expired |
| US5294889A | Battery operated capacitance measurement circuit | Physics | 103 | Expired |
| US5090052A | Telephone system with multiple extension telephones | Electricity | 95 | Expired |
| US4996709A | Intercom telephone | Electricity | 90 | Expired |
| US5261072A | Compact disk data transfer system using cache memory | Physics | 72 | Expired |
| US4590556A | Co-processor combination | Physics | 67 | Expired |
| US4679166A | Co-processor combination | Physics | 65 | Expired |
| US5091939A | Method and apparatus for password protection of a computer | Physics | 62 | Expired |
| USD329238S | Universal remote controller | General | 58 | Expired |
| US5147986A | Subwoofer speaker system | Electricity | 54 | Expired |
| US4503429A | Computer graphics generator | Physics | 51 | Expired |
| US5031119A | Split screen keyboard emulator | Emerging Cross-Sectional Technologies | 47 | Expired |
| US5473686A | Echo cancellation apparatus | Electricity | 46 | Expired |
| US5254984A | VGA controller for displaying images having selective components from multiple image planes | Electricity | 42 | Expired |
| US4545016A | Memory management system | Physics | 40 | Expired |
| US5563952A | Automatic dynamic VOX circuit | Electricity | 37 | Expired |
| US4866423A | Overhead sprinkler head proximity alarm | Electricity | 35 | Expired |
| US5657384A | Full duplex speakerphone | Electricity | 34 | Expired |
| US4852077A | Optical data storage media with spatially variable energy absorptivity | Emerging Cross-Sectional Technologies | 34 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.