Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4625763 | Disc-axial multiport valve | David L. Schick, Gary Schumann | 1986-12-02 |
| 4614204 | Rotary valve for interconnecting conduits in three groups | — | 1986-09-30 |
| 4574840 | Multiport axial valve with balanced rotor | Gary Schumann, David L. Schick | 1986-03-11 |
| 4569371 | Axial multiport rotary valve | Gary Schumann, David L. Schick | 1986-02-11 |