Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4306224 | Analog-to-digital converting apparatus | William L. Geller | 1981-12-15 |
| 4306225 | Digital-to-analog converting apparatus | William L. Geller | 1981-12-15 |
| 4272762 | Exit-entry sensing apparatus | William L. Geller | 1981-06-09 |
| 4255669 | Sensing apparatus | — | 1981-03-10 |