Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873538 | Pen shuttle guide and spring return | — | 1989-10-10 |
| 4860032 | Automatic pen capping mechanism | — | 1989-08-22 |
| 4853714 | Automatic pen type sensor for graphic recorder | — | 1989-08-01 |
| 4827293 | Symmetrical braking system for a graphic recorder | — | 1989-05-02 |
| 4806954 | Pen carriage suspension for graphic recorder | — | 1989-02-21 |