Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5678643 | Acoustic logging while drilling tool to determine bed boundaries | Carl A. Robbins, John W. Minear, Batakrishna Mandal, James R. Birchak, Eugene J. Linyaev | 1997-10-21 |
| 5639997 | Acoustic noise cancelling apparatus for well logging and method of well logging | — | 1997-06-17 |
| 5313025 | Displacement amplified acoustic transmitter | Dennis Roessler | 1994-05-17 |
| 4700803 | Transducer forming compression and shear waves for use in acoustic well logging | John W. Minear | 1987-10-20 |
| 4580252 | Wide band acoustic receiver transducer | — | 1986-04-01 |
| 4493062 | Resonant frequency modification of piezoelectric transducers | — | 1985-01-08 |
| 4450540 | Swept energy source acoustic logging system | — | 1984-05-22 |