Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331178 | Curb box for plastic valve | Robert C. Stewart | 1982-05-25 |
| 4308886 | Curb box | Richard E. Hammond, Robert E. Diffenderfer | 1982-01-05 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331178 | Curb box for plastic valve | Robert C. Stewart | 1982-05-25 |
| 4308886 | Curb box | Richard E. Hammond, Robert E. Diffenderfer | 1982-01-05 |