Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854027 | Manufacture of impact printing ribbon cartridge | George R. W. Sully, Martin Crisp | 1989-08-08 |
| 4813731 | Release mechanism | — | 1989-03-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854027 | Manufacture of impact printing ribbon cartridge | George R. W. Sully, Martin Crisp | 1989-08-08 |
| 4813731 | Release mechanism | — | 1989-03-21 |