Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6681943 | Railcar draft gear assembly and system | Charles E. Burkhart, Marlin E. Clark, John F. Deppen, V. Terrey Hawthorne, Horst T. Kaufhold +3 more | 2004-01-27 |
| 6446820 | Railcar draft gear assembly and system | Charles E. Burkhart, Marlin E. Clark, John F. Deppen, V. Terrey Hawthorne, Horst T. Kaufhold +3 more | 2002-09-10 |
| 4811442 | Sweeping apparatus | — | 1989-03-14 |
| 4491300 | Valve with improved sealing structure | A. Kenneth Wilson | 1985-01-01 |
| 4252085 | Animal twitch | — | 1981-02-24 |