Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6026602 | Apparatus and method of indirectly illuminating a sign | Daniel J. Grondal | 2000-02-22 |
| 5768814 | Exit sign with removable emergency power pack module | Edward Kozek | 1998-06-23 |
| 5727867 | Canopy mounting device for exit signs and the like | — | 1998-03-17 |
| 5542201 | Indirectly illuminated sign | Daniel J. Grondal | 1996-08-06 |
| 5461550 | Canopy mounting device for exit signs and the like | — | 1995-10-24 |
| 5428912 | Indirectly illuminated sign | Daniel J. Grondal | 1995-07-04 |
| 5272605 | Canopy mounting device for exit signs and the like | — | 1993-12-21 |
| 5247756 | Sign apparatus with insertible directional arrow | — | 1993-09-28 |
| D314750 | Male electrical connector | Joseph S. Wegrzyn | 1991-02-19 |
| D314751 | Female electrical connector | Joseph S. Wegrzyn | 1991-02-19 |
| 4885474 | Connector assembly for plug-in energization and battery activation of an associated electrical apparatus | Joseph S. Wegrzyn | 1989-12-05 |
| 4561203 | Opaque sign plaque with dual reflector illumination | Robert D. MacDonald, Jr., William A. Luca | 1985-12-31 |