Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857398 | Electrosensitive recording | John A. Hill, Norman B. Cohen | 1989-08-15 |
| 4804430 | Metallization of support members | Roswell E. Hubbard, John F. McDermott, Philip J. Clough | 1989-02-14 |