Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4394098 | Radial gate having fine tuning of flow control | Warren G. Whippen | 1983-07-19 |
| 4357121 | Flap-gate for bottom discharge control in canals having ice problems | — | 1982-11-02 |