Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820474 | Pressure seal stud hole plug unit | Paul N. Shadle, Herman C. Wolf | 1989-04-11 |
| 4611485 | High pressure pipe stopper | — | 1986-09-16 |
| 4381800 | Pipe tester plug | — | 1983-05-03 |
| 4312708 | Reactor stud hole plug unit | — | 1982-01-26 |