Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5183978 | Elevator governor rope block actuation in low speed emergency situations | William G. Sheridan | 1993-02-02 |
| 5183979 | Elevator governor rope restraint when elevator car moves with car doors open | William G. Sheridan | 1993-02-02 |
| 4977982 | Elevator sheave brake safety | Louis Bialy, Anthony Cooney, William G. Sheridan | 1990-12-18 |