Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9802239 | Rotary valve system | Gregory H. Butcher, Robert D. Turnbull, Neil A. Zumberger | 2017-10-31 |
| 9476512 | Rotary valve system | Gregory H. Butcher, Robert D. Turnbull, Neil A. Zumberger | 2016-10-25 |