Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10830197 | Two-position gate and sprung gate valves having a full-flow open position and a restricted-flow open position | David E. Fletcher, James H. Miller | 2020-11-10 |
| 10525952 | Aspirators for producing vacuum using the venturi effect | David E. Fletcher, Brian M. Graichen, Keith Hampton, Andrew Niedert | 2020-01-07 |