Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4514244 | Plastic pipe elements and methods for making same | Robert R. Shaefer | 1985-04-30 |
| 4457542 | Plastic pipe fitting | Robert R. Shaefer | 1984-07-03 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4514244 | Plastic pipe elements and methods for making same | Robert R. Shaefer | 1985-04-30 |
| 4457542 | Plastic pipe fitting | Robert R. Shaefer | 1984-07-03 |