Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5077016 | Apparatus for producing gas-air concentrations | Richard E. Layng, Gunther J. Evanina, Purnachandra Pai | 1991-12-31 |
| 4263890 | Flue restrictor | John W. Turko, Maurice N. Day, Howard B. Pritz, Larry E. Schluer, Henry F. Seidel +2 more | 1981-04-28 |