Issued Patents 2021
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11208335 | Piston valve with annular passages | William D. Chandler, Jr., Aaron R. Wolfe, Patrick Frazer | 2021-12-28 |
| 11209839 | Pump controller apparatus | William D. Chandler, Jr., Aaron R. Wolfe, Patrick Frazer | 2021-12-28 |
| 11203532 | Piston valve with annular passages | William D. Chandler, Jr., Aaron R. Wolfe, William D. Chandler, III, Patrick Frazer | 2021-12-21 |
| 11192797 | Piston valve with annular passages | William D. Chandler, Jr., Aaron R. Wolfe | 2021-12-07 |
| D924177 | Pressure switch | William D. Chandler, Jr., Aaron R. Wolfe, Patrick Frazer | 2021-07-06 |
| 10948091 | Piston valve with annular passages | William D. Chandler, Jr., Aaron R. Wolfe | 2021-03-16 |