Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5864920 | Door closer for the non-fire side of a fire-door safety installation | Rex H. Lasson, Roderick A. L. Ross | 1999-02-02 |
| 5709009 | Door closer for the non-fire side of a fire-door safety installation | Rex H. Lasson, Roderick A. L. Ross | 1998-01-20 |
| 5088152 | Door security track | — | 1992-02-18 |
| 4916267 | Door closer position monitor | Thomas R. Lasier | 1990-04-10 |
| 4835905 | Door position indicator for a door closer | Thomas R. Lasier | 1989-06-06 |
| 4506407 | Releasable hold-open device for a door closer | — | 1985-03-26 |