Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6615894 | Self-closing single-sided accordion fire door | — | 2003-09-09 |
| 5893234 | Time delay release mechanism for a fire barrier | — | 1999-04-13 |
| 5743320 | Obstruction-responsive brake actuator for fire door or the like | — | 1998-04-28 |
| 5673514 | Time delay release mechanism for a fire barrier | — | 1997-10-07 |
| 5605185 | Fire door system | — | 1997-02-25 |
| 5577541 | Rolling door assembly having pass door arrangement | — | 1996-11-26 |
| 5542460 | Self-closing fire door | — | 1996-08-06 |
| 5355927 | Self-closing fire door | — | 1994-10-18 |
| 5245879 | Fail-safe fire door release mechanism having automatic reset | — | 1993-09-21 |