Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6024638 | Fume hood having a driven sash and a travel interference system for the sash | Robert L. Berlin, Richard L. Wendt | 2000-02-15 |
| 5759096 | Trimodal air/fluid driven sash operator fume hood | Robert M. Berlin | 1998-06-02 |
| 5303659 | Down draft work table | Robert M. Berlin, Richard L. Wendt, Waynne R. Zeigler | 1994-04-19 |
| 4667353 | Automatically closing modesty curtain | Roy F. Zeigler | 1987-05-26 |
| 4594742 | Automatically closing modesty curtain | Roy F. Ziegler | 1986-06-17 |
| 4502375 | Fume hood sash operator | Alan L. Hignite, Richard L. Wendt, Roy F. Zeigler | 1985-03-05 |