Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4699054 | Printing device with disposable cartridge and filling means | John St. John | 1987-10-13 |
| 4580495 | Printing device with disposable cartridge | — | 1986-04-08 |
| 4556012 | Disposable ink cartridge | — | 1985-12-03 |