Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D283154 | Air manifold unit | — | 1986-03-25 |
| D275339 | Tester case | — | 1984-09-04 |
| D273675 | Heater end cap | — | 1984-05-01 |
| D264446 | Temporary cold control device | Alvin S. Drutz | 1982-05-18 |
| D263788 | Universal mounting bracket | Alvin S. Drutz | 1982-04-13 |
| 4262490 | Selectively mountable cold control device | Alvin S. Drutz | 1981-04-21 |
| D258056 | Fan motor | Alvin S. Drutz, James Nelson, by Lorraine Nelson, executrix | 1981-01-27 |
| 4224544 | Fan motor having reversible rotor | Alvin S. Drutz, James Nelson, Lorraine Nelson, executrix | 1980-09-23 |