Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4926974 | Elevator car with improved car door clutch | Arnold M. Morris, Richard H. Pilsbury, J. Warren Barkell, Jr., Karl B. Orndorff | 1990-05-22 |
| 4776433 | Elevator door control system | James L. Lagree, Richard A. Johnson, Dirk J. Boomgaard | 1988-10-11 |