Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10167669 | Ladder shelf system | — | 2019-01-01 |
| 6182653 | Exhaust hood | Frederick F. Fritz | 2001-02-06 |
| 5292353 | Air scrubber | Arnold S. Kaufman, Robert L. Anderson, Donald W. Alwood, Frederick F. Fritz | 1994-03-08 |