Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864328 | Dual mode ink jet printer | — | 1989-09-05 |
| 4835554 | Ink jet array | Paul A. Hoisington, Robert R. Schaffer | 1989-05-30 |
| 4825227 | Shear mode transducer for ink jet systems | Paul A. Hoisington | 1989-04-25 |