Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872381 | Programmable magnetic repulsion punching apparatus | — | 1989-10-10 |
| 4821614 | Programmable magnetic repulsion punching apparatus | Russell W. Fleet, David C. Long, Gerhard Weiss | 1989-04-18 |