Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4667353 | Automatically closing modesty curtain | Warren L. Zeigler | 1987-05-26 |
| 4502375 | Fume hood sash operator | Alan L. Hignite, Richard L. Wendt, Warren L. Zeigler | 1985-03-05 |