Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7650963 | Acoustic isolator for well logging system | Charles E. Redding, Charles Hartmann, Douglas J. Patterson | 2010-01-26 |
| 6909666 | Method and apparatus for generating acoustic signals for LWD shear velocity measurement | Vladimir Dubinsky, James V. Leggett, III, Douglas J. Patterson, Julie C. Slaughter, Toby Hansen +1 more | 2005-06-21 |
| 6820716 | Acoustic isolator for well logging system | Charles E. Redding, Charles Hartmann, Douglas J. Patterson | 2004-11-23 |
| 6272434 | Drilling system with downhole apparatus for determining parameters of interest and for adjusting drilling direction in response thereto | Macmillan H. Wisler, Wallace H. Meyer, Daniel C. Minette, Ronald J. Deady, James V. Leggett, III +1 more | 2001-08-07 |
| 5812068 | Drilling system with downhole apparatus for determining parameters of interest and for adjusting drilling direction in response thereto | Macmillan M. Wisler, Wallace H. Meyer, Daniel C. Minette, Ronald J. Deady, James V. Leggett, III +1 more | 1998-09-22 |
| 5679894 | Apparatus and method for drilling boreholes | Volker Kruger, John W. Harrell | 1997-10-21 |
| 5050692 | Method for directional drilling of subterranean wells | — | 1991-09-24 |
| 4817740 | Apparatus for directional drilling of subterranean wells | — | 1989-04-04 |
| 4560013 | Apparatus for directional drilling and the like of subterranean wells | — | 1985-12-24 |
| 4522272 | Apparatus for directional drilling of subterranean wells | — | 1985-06-11 |
| 4515011 | Torque transmitting and indicating device for well drilling apparatus | — | 1985-05-07 |
| 4495073 | Retrievable screen device for drill pipe and the like | — | 1985-01-22 |
| 4476944 | Method of providing a fluid seal in downhole drilling apparatus | — | 1984-10-16 |
| 4462472 | Marine bearing for a downhole drilling apparatus | — | 1984-07-31 |
| 4372400 | Apparatus for applying pressure to fluid seals | — | 1983-02-08 |
| 4291723 | Fluid pressure actuated by-pass and relief valve | Paul H. Reinhardt | 1981-09-29 |
| 4280524 | Apparatus and method for closing a failed open fluid pressure actuated relief valve | — | 1981-07-28 |
| 4275795 | Fluid pressure actuated by-pass and relief valve | Paul Andrew Reinhardt | 1981-06-30 |
| 4263788 | Universal joint apparatus having sliding plate construction for separating thrust and torque forces | — | 1981-04-28 |