Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5285689 | Piping inspection instrument carriage with precise and repeatable position control and location determination | Mark Hapstack, W. Thor Zollinger, Frank M. Heckendorn, Larry R. Park | 1994-02-15 |