Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5017745 | Burner control device and electrical switch unit assembly, parts therfor and methods of making the same | — | 1991-05-21 |
| 4993144 | Method of making a cyclable electrical switch construction | David T. Llewellyn | 1991-02-19 |
| 4883983 | Switching system for plural load circuit | David T. Llewellyn | 1989-11-28 |
| 4843198 | Burner control device and electrical switch unit assembly, parts therefor and methods of making the same | — | 1989-06-27 |