Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835343 | Two piece face plate for wall box mounted device | John T. Graef, Joel S. Spira | 1989-05-30 |
| 4833277 | Wall plate insert | Noel Mayo, Joel S. Spira | 1989-05-23 |
| 4825075 | Non-electronic gain control | Stephen J. Yuhasz, Noel Mayo | 1989-04-25 |
| 4803380 | Cover and support plate arrangement for wall mounted devices | Michael J. D'Aleo, David G. Luchaco, Joel S. Spira, Richard A. Wagner, Stephen J. Yuhasz +1 more | 1989-02-07 |