Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4318634 | Non-vibrating collapsible dam | — | 1982-03-09 |
| 4310262 | Collapsible dam and apparatus for raising and lowering the dam | Francesco Calza | 1982-01-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4318634 | Non-vibrating collapsible dam | — | 1982-03-09 |
| 4310262 | Collapsible dam and apparatus for raising and lowering the dam | Francesco Calza | 1982-01-12 |