Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857721 | Optical direction sensor having gray code mask spaced from a plurality of interdigitated detectors | David S. Dunavan, Stephen Messelt, Edward T. Siebert | 1989-08-15 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857721 | Optical direction sensor having gray code mask spaced from a plurality of interdigitated detectors | David S. Dunavan, Stephen Messelt, Edward T. Siebert | 1989-08-15 |