Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4972300 | Emergency lighting device | David A. Beisswanger, Bruce H. Baretz, Edward T. Rockwell | 1990-11-20 |
| 4193109 | Personnel marker device | William R. Heffernan, Mary-Louise Vega | 1980-03-11 |