Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5516230 | Gate for controlling upstream water level | Robert Graham Bartlett | 1996-05-14 |
| 4226553 | Slide gates for water and sewage treatment plants | George E. Whipps | 1980-10-07 |