Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6311621 | Shock-resistant electronic circuit assembly | Paul N. Marshall, Brendan Michael Walsh, James E. Fritz | 2001-11-06 |
| 6244157 | Wire carrier perforating gun | — | 2001-06-12 |
| 6079332 | Shock-resistant electronic circuit assembly | Paul N. Marshall, Brendan Michael Walsh, James E. Fritz | 2000-06-27 |
| 5929368 | Hybrid electronic detonator delay circuit assembly | David W. Ewick, Paul N. Marshall, Kenneth A. Rode, Brendan Michael Walsh | 1999-07-27 |
| 5792975 | Connector block having detonator-positioning locking means | James E. Fritz, Daniel P. Sutula, Jr. | 1998-08-11 |
| 5708228 | Method and apparatus for transfer of initiation signals | Daniel P. Sutula, Jr., Ronald M. Dufrane, Thomas F. Lilley, Jr., Steven L. Renfro, Jeffrey H. Burton +2 more | 1998-01-13 |
| 5703319 | Connector block for blast initiation systems | James E. Fritz, Daniel P. Sutula, Jr. | 1997-12-30 |
| 5477785 | Well pipe perforating gun | Charles A. Dieman, Jr., Daniel Toro, James E. Fritz, Scot P. Riley, Craig Boucher +1 more | 1995-12-26 |