Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6389872 | Mandrel apparatus with floating spring members | — | 2002-05-21 |
| 5943927 | Apparatus and method for counterboring a pipe | Oliver T. Dierlam | 1999-08-31 |
| 5361659 | Apparatus and method for counterboring a pipe | — | 1994-11-08 |