Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5541623 | Temperature compensated opto-electronic circuit and mouse using same | — | 1996-07-30 |
| 5446259 | Method for producing opto-electronic circuit using laser-trimming device | — | 1995-08-29 |
| 4704601 | Keyboard data entry system with hysteresis | — | 1987-11-03 |
| 4611406 | Enclosure for electrical data input apparatus | Bjarne Frederiksen | 1986-09-16 |
| 4517553 | N-Key rollover keyboard | — | 1985-05-14 |
| 4479392 | Force transducer | John W. Froeb | 1984-10-30 |
| 4390866 | Keyboard with electronic hysteresis | — | 1983-06-28 |