William R. Heffner
6Patents
5h-index
8Co-inventors
56Inventor score
Filing activity: Apr 16, 1979 → Apr 7, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4529271A | Matrix addressed bistable liquid crystal display | Physics | 40 | Expired |
| US4239345A | Bistable liquid crystal twist cell | Physics | 38 | Expired |
| US4505548A | Bistable liquid crystal twist cell | Physics | 20 | Expired |
| US6555457B1 | Method of forming a laser circuit having low penetration ohmic contact providing impurity gettering and the resultant laser circuit | Electricity | 9 | Expired |
| US6255707A | Semiconductor laser reliability test structure and method | Electricity | 6 | Expired |
| US6265237A | In-wafer testing of DFB semiconductor lasers | Electricity | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.