Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4975571 | Opto-electronic scale-reading apparatus | David R. McMurtry, William F. N. Stephens | 1990-12-04 |
| 4949289 | Interpolation apparatus | W. F. N. Stephens | 1990-08-14 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4975571 | Opto-electronic scale-reading apparatus | David R. McMurtry, William F. N. Stephens | 1990-12-04 |
| 4949289 | Interpolation apparatus | W. F. N. Stephens | 1990-08-14 |