Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4352656 | Gas appliance control device | Douglas Brad Campbell | 1982-10-05 |
| 4319873 | Flame detection and proof control device | Douglas Brad Campbell | 1982-03-16 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4352656 | Gas appliance control device | Douglas Brad Campbell | 1982-10-05 |
| 4319873 | Flame detection and proof control device | Douglas Brad Campbell | 1982-03-16 |