Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5927690 | Push-pull chain drive door operator system | James White, Nicholas A. Dragomir | 1999-07-27 |
| 5664372 | Clutchless screw drive door operator | Gregory E. Williams, James White, Nicholas A. Dragomir | 1997-09-09 |
| 5568704 | Clutchless screw drive door operator | Gregory E. Williams, James White, Nicholas A. Dragomir | 1996-10-29 |
| 5085094 | Door operator coupling assembly | Charles W. Clawson | 1992-02-04 |