Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4641776 | Segmented concentric centralizer | David J. Vlasek | 1987-02-10 |
| 4531582 | Well conduit centralizer | John F. Muse, Frank S. Zeiler, Juventino Buruato | 1985-07-30 |
| 4530399 | Stop device for well conduit | — | 1985-07-23 |