Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4469459 | Color printer | Richard D. Trezise, John R. Boldt | 1984-09-04 |
| 4448556 | Cartridge for matrix printer | Richard D. Trezise, John R. Boldt | 1984-05-15 |
| 4329634 | Motion sensing apparatus | John C. Dunfield, Andrew Gabor | 1982-05-11 |