Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5206971 | Apparatus and method for increasing the efficiency of a door closer by reducing friction therein | Lynn A. Schmelzer | 1993-05-04 |
| 4979261 | Variable position door closer | Andrew Current | 1990-12-25 |
| 4916267 | Door closer position monitor | William L. Downey | 1990-04-10 |
| 4864686 | Tamper resistant track assembly | Thomas Ford | 1989-09-12 |
| 4835905 | Door position indicator for a door closer | William L. Downey | 1989-06-06 |