Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4315630 | Sealing ring for spigot and socket pipe joint | David W. French, Robert W. Heisler, Antonio Maldarella, Jr. | 1982-02-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4315630 | Sealing ring for spigot and socket pipe joint | David W. French, Robert W. Heisler, Antonio Maldarella, Jr. | 1982-02-16 |