Issued Patents All Time
Showing 51–56 of 56 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5459450 | Presence-detecting system | — | 1995-10-17 |
| 5146209 | Self-contained apparatus for emergency lighting incorporating alarm systems for fire, gas and the like | — | 1992-09-08 |
| 5022627 | Sign projecting from vertical walls or horizontal beams | — | 1991-06-11 |
| 4976633 | Improvement in quick end connection systems for lamps especially lamp with a weatherproof housing | — | 1990-12-11 |
| 4945280 | Independent emergency lighting system with self-diagnosis | — | 1990-07-31 |
| 4929192 | Connection and fixing system for electronic unit | — | 1990-05-29 |