Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9470808 | Micro-geophone | — | 2016-10-18 |
| 9297916 | Micro-geophone | — | 2016-03-29 |
| 8976627 | Micro-geophone | — | 2015-03-10 |
| 8947980 | Micro-geophone | — | 2015-02-03 |
| 8208347 | Geophone having improved damping control | — | 2012-06-26 |
| 8098546 | Geophone having improved sensitivity | — | 2012-01-17 |
| 8050144 | Vertical geophone having improved distortion characteristics | — | 2011-11-01 |
| 7369716 | High pressure and high temperature acoustic sensor | Arne Berg, Sverre Knudsen, Geir Bjarte Havsgard, James Dunphy | 2008-05-06 |
| 7116850 | Hydrophone mandrel for precise placement of gratings | — | 2006-10-03 |
| 7082079 | Pressure compensated hydrophone | — | 2006-07-25 |
| 7013729 | Highly sensitive accelerometer | Sverre Knudsen, Arne Berg, James Dunphy | 2006-03-21 |
| 6882595 | Pressure compensated hydrophone | — | 2005-04-19 |
| 6789424 | Highly sensitive accelerometer | Sverre Knudsen, Arne Berg, James Dunphy | 2004-09-14 |
| 6575033 | Highly sensitive accelerometer | Sverre Knudsen, Arne Berg, James Dunphy | 2003-06-10 |
| 5555222 | Low distortion geophone spring | — | 1996-09-10 |
| 5469408 | High resolution geophone | — | 1995-11-21 |
| 5450375 | Geophone shock absorber | — | 1995-09-12 |
| 5134594 | Geophone spring | — | 1992-07-28 |
| 5119345 | Geophone | James C. Woodall | 1992-06-02 |