Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5251400 | Control for a door closer having a power-assist opening feature | — | 1993-10-12 |
| 4995194 | Power-assist door closer | Richard Easter, Robert V. Funderburk | 1991-02-26 |
| 4500069 | Hydraulic directional control valve | Ralph R. Barber | 1985-02-19 |
| D266091 | Hydraulic power pump | Robert E. Richards | 1982-09-07 |