Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862394 | Drop height recorder | David B. Thompson, Stanley V. Preskitt, Harvey L. Downing | 1989-08-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862394 | Drop height recorder | David B. Thompson, Stanley V. Preskitt, Harvey L. Downing | 1989-08-29 |