Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4327891 | Flush valve diaphragm having plastic insert | Charles S. Allen, Charles C. Allen | 1982-05-04 |
| 4313471 | Flow control | — | 1982-02-02 |
| 4309781 | Automatic flushing system | — | 1982-01-12 |