Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6289143 | Fiber optic acoustic emission sensor | John W. Berthold | 2001-09-11 |
| 6097478 | Fiber optic acoustic emission sensor | John W. Berthold | 2000-08-01 |
| 5832157 | Fiber optic acoustic emission sensor | John W. Berthold | 1998-11-03 |
| 5517851 | Method and apparatus for predicting onset of intergranular attack and stress corrosion cracking in tubing subjected to hostile environment | John W. Berthold, Thomas O. Passell | 1996-05-21 |