Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10767523 | Auxiliary drive system for a pump | Paul Shepherd | 2020-09-08 |
| 10422257 | Auxiliary drive system for a pump | Paul Shepherd | 2019-09-24 |
| 4833380 | Hoist motor protection | — | 1989-05-23 |
| 4776432 | Automatic elevator hall call delay apparatus | — | 1988-10-11 |
| 4471856 | Elevator door interlock | — | 1984-09-18 |