Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862424 | Interferometric means and method for accurate determination of fiberoptic well logging cable length | Peter Graebner, Swan A. Sie | 1989-08-29 |
| 4847814 | Three-dimensional borehole televiewer display | — | 1989-07-11 |
| 4803479 | Electrical phase measurement means and method for accurate determination of well logging cable length | Peter Graebner, Swan A. Sie | 1989-02-07 |