Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4587511 | Elevator system with hall lamp status monitoring | Alan L. Husson, Michael J. Brick | 1986-05-06 |
| 4555689 | Elevator system with lamp status and malfunction monitoring | Michael J. Brick | 1985-11-26 |
| 4469199 | Elevator system | Marjorie J. Polis, Matthew F. Kersen | 1984-09-04 |
| 4463833 | Elevator system | Richard H. Ludwig, Alan L. Husson | 1984-08-07 |
| 4436185 | Elevator system | Richard H. Ludwig, Wing C. Quan, Alan L. Husson, Marjorie J. Polis | 1984-03-13 |