Williams Electronics, Inc.
12Patents
0Active
12Granted
34Portfolio score
Filing activity: Apr 9, 1979 → Apr 18, 1988
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4606545A | Bi-level pinball machine providing interlevel ball travel | Human Necessities | 133 | Expired |
| USD280836S | Video game cabinet | General | 130 | Expired |
| USD275772S | Amusement game cabinet | General | 130 | Expired |
| USD280835S | Video game cabinet | General | 128 | Expired |
| US4373725A | Pinball machine having magnetic ball control | Human Necessities | 126 | Expired |
| US4890833A | Apparatus for generating enhanced interactive video game playfield environments | Electricity | 49 | Expired |
| US4685677A | Automatic replay control system and method for amusement devices | Human Necessities | 46 | Expired |
| US4856785A | Optical dual function joystick | Physics | 30 | Expired |
| US4272649A | Processor controlled sound synthesizer | Physics | 19 | Expired |
| US4570158A | Horizontal and vertical image inversion circuit for a video display | Physics | 17 | Expired |
| US4809297A | Interface device | Electricity | 16 | Expired |
| US4822046A | Two and four position target assembly | Human Necessities | 6 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.