Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851807 | Electric switch and contact terminal arrangement | Donald E. Place | 1989-07-25 |
| 4843364 | Thermostatic electric switch | Donald E. Place | 1989-06-27 |
| 4827239 | Heat collector | Douglas P. Versaw | 1989-05-02 |