Issued Patents All Time
Showing 76–84 of 84 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6301959 | Focused formation fluid sampling probe | Andrew Albert Hrametz, Clarence C. Gardner, Margaret C. Waid | 2001-10-16 |
| 5934374 | Formation tester with improved sample collection system | Andrew Albert Hrametz, James M. Moore | 1999-08-10 |
| 5831177 | Fluid driven siren flowmeter | Margaret C. Waid, Wilson C. Chin, Jimmy Wayne Anders | 1998-11-03 |
| 5741962 | Apparatus and method for analyzing a retrieving formation fluid utilizing acoustic measurements | James R. Birchak | 1998-04-21 |
| 5703286 | Method of formation testing | Wilson C. Chin, Chih-Chang Chen | 1997-12-30 |
| 5672819 | Formation evaluation using phase shift periodic pressure pulse testing | Wilson C. Chin | 1997-09-30 |
| 5644076 | Wireline formation tester supercharge correction method | Margaret C. Waid, Wilson C. Chin | 1997-07-01 |
| 5602334 | Wireline formation testing for low permeability formations utilizing pressure transients | Margaret C. Waid | 1997-02-11 |
| 4275500 | Rotary shear | Howard D. Speer | 1981-06-30 |