Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4892373 | Sign bit optical geophone | — | 1990-01-09 |
| 4862424 | Interferometric means and method for accurate determination of fiberoptic well logging cable length | Peter Graebner, Jorg A. Angehrn | 1989-08-29 |
| 4803479 | Electrical phase measurement means and method for accurate determination of well logging cable length | Peter Graebner, Jorg A. Angehrn | 1989-02-07 |
| 4722603 | Interferometric means and method for accurate determination of fiber-optic well logging cable length | Peter Graebner, Jorg A. Angehrn | 1988-02-02 |
| 4694162 | Sign bit optical-electrical geophone | — | 1987-09-15 |
| 4233677 | Automatic system and method for testing marine streamers of seismic exploration systems | Earl J. Brown | 1980-11-11 |