Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883956 | Methods and apparatus for gamma-ray spectroscopy and like measurements | Charles L. Melcher, Ralph A. Manente | 1989-11-28 |
| 4810876 | Logging apparatus and method for determining absolute elemental concentrations of subsurface formations | Peter Wraight, Russel C. Hertzog, Darwin V. Ellis, Hubert D. Scott, James A. Grau | 1989-03-07 |