Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7280214 | Method and apparatus for a high resolution downhole spectrometer | Rocco DiFoggio, Paul Bergren | 2007-10-09 |
| 7214933 | Method and apparatus for a downhole fluorescence spectrometer | Rocco DiFoggio, Paul Bergren | 2007-05-08 |
| 7197195 | Fiber optics head utilizing randomized fibers per sensor | Rocco DiFoggio | 2007-03-27 |
| 7162918 | Method and apparatus for downhole fluid characterization using flexural mechanical resonators | Rocco DiFoggio, Paul Bergren, Peter W. Reittinger | 2007-01-16 |
| 7084392 | Method and apparatus for a downhole fluorescence spectrometer | Rocco DiFoggio, Paul Bergren, Louis Perez | 2006-08-01 |
| 7016026 | Method and apparatus for a downhole refractometer and attenuated reflectance spectrometer | Rocco DiFoggio, Paul Bergren, Louis Perez | 2006-03-21 |
| 6938470 | Method and apparatus for downhole fluid characterization using flexural mechanical resonators | Rocco DiFoggio, Paul Bergren | 2005-09-06 |
| 6798518 | Method and apparatus for a derivative spectrometer | Rocco DiFoggio, Paul Bergren | 2004-09-28 |
| 6794652 | Method and apparatus for a rigid backup light source for down-hole spectral analysis | — | 2004-09-21 |
| 6683681 | Method and apparatus for a downhole refractometer and attenuated reflectance spectrometer | Rocco DiFoggio, Paul Bergren | 2004-01-27 |
| 5917774 | Magnetic motion coupling for well logging instruments | Randy Gold, Albert Alexy, Wade DuPree, Saeed Rafie | 1999-06-29 |
| 5808191 | Well logging instrument string having flexibly coupled segments and a selectably operable flexible coupling therefor | Albert Alexy, Randy Gold, James E. Brewer | 1998-09-15 |
| 4941349 | Coaxial coiled-tubing cable head | William S. Kennedy, Kenneth J. Wolfe | 1990-07-17 |
| 4710711 | Apparatus for nondestructive testing of subsurface piping using three coils with opposing fields | — | 1987-12-01 |
| 4540941 | Casing collar indicator for operation in centralized or decentralized position | — | 1985-09-10 |
| 4431963 | Apparatus for determining a natural current flow in well casing | — | 1984-02-14 |
| 4431964 | Method for determining a natural current flow in well casing | — | 1984-02-14 |
| 4415030 | Casing re-entry apparatus for use in inclined oil and gas boreholes | Eugene J. Linyaev | 1983-11-15 |
| 4410051 | System and apparatus for orienting a well casing perforating gun | Wilbur L. Daniel, Eugene J. Linyaev, Gregory J. Wilkinson | 1983-10-18 |
| 4335602 | Method and apparatus for protecting subsurface electronic assemblies from shock and vibration damage | — | 1982-06-22 |