Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4650351 | Thermal printer | Vencil D. Engle, Cameron H. Hafer, Frank Hughes, Edward G. Stewart, Ramon L. Street +1 more | 1987-03-17 |
| 4367052 | Flat rate spring particularly adapted for typewriter cartridges | — | 1983-01-04 |
| 4272201 | Ribbon shaper for typewriter cartridge | — | 1981-06-09 |
| 4239107 | Cartridge assembly apparatus for typewriters | Richard G. Boyatt, Jr. | 1980-12-16 |