Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5025242 | Oven thermostat | Calvin J. Holtkamp, George L. Hetrick | 1991-06-18 |
| 4478577 | Orthodontic appliance | — | 1984-10-23 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5025242 | Oven thermostat | Calvin J. Holtkamp, George L. Hetrick | 1991-06-18 |
| 4478577 | Orthodontic appliance | — | 1984-10-23 |