Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4633904 | Prevention of water hammer in rotary valve for interconnecting conduits | Gary Schumann | 1987-01-06 |
| 4625763 | Disc-axial multiport valve | Gary Schumann, Charles A. Dolejs | 1986-12-02 |
| 4574840 | Multiport axial valve with balanced rotor | Gary Schumann, Charles A. Dolejs | 1986-03-11 |
| 4569371 | Axial multiport rotary valve | Charles A. Dolejs, Gary Schumann | 1986-02-11 |