Issued Patents All Time
Showing 26–43 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5896925 | Tool protection guide | Gerald Brian Swagerty, John Robert Herold, Don B. Wafer, Randy Elum, Bashir M. Koleilat +1 more | 1999-04-27 |
| 5791657 | Seals containing composite non-extrusion springs | Andrew C. Posluszny, Rudolf R. Schoen, Jerald L. Smith, Robert Keith Stoddard, Jr., John C. Vicic +3 more | 1998-08-11 |
| 5782297 | Retrieval tool for back pressure valve and tree test plug | Martin L. Samuels, Bashir M. Koleilat, John Robert Herold, Neil Crawford, Henry Wong | 1998-07-21 |
| 5775422 | Tree test plug | Henry Wong, Jeffrey L. Mathews | 1998-07-07 |
| 5755287 | Sealing assembly for subsea wellheads | Gerald Brian Swagerty, Robert R. Schoen | 1998-05-26 |
| 5730218 | Tool protection guide with energy absorbing bumper | Gerald Brian Swagerty, John Robert Herold, Don B. Wafer, Randy Elum, Bashir M. Koleilat +1 more | 1998-03-24 |
| 5474124 | Wellhead retrieval tool assembly | Martin L. Samuels, Bashir M. Koleilat, John Robert Herold, Neil Crawford | 1995-12-12 |
| 5031695 | Well casing hanger with wide temperature range seal | Ronald W. Henley, Kevin P. Long, Tep Ungchusri, John C. Vicic | 1991-07-16 |
| 4848777 | Pressure energized/pressure intensified casing seal | David Zollo, Roy W. Benefield, Phillip F. Huang, Brenda K. Montemayor, Ray V. MYERS +3 more | 1989-07-18 |
| D274227 | Hydraulic filter press for pressing liquid from a drilling mud or the like | — | 1984-06-12 |
| D271570 | High temperature, high pressure filter press for testing drilling fluids or similar apparatus | — | 1983-11-29 |
| D270718 | Field hand pump for use in the measuring of properties of drilling mud, or the like | — | 1983-09-27 |
| 4397177 | Hydraulic filter press | — | 1983-08-09 |
| D268820 | Pressurized density measuring apparatus | — | 1983-05-03 |
| 4374474 | Pressurized density measuring apparatus | — | 1983-02-22 |
| 4321829 | Density measuring apparatus | — | 1982-03-30 |
| D262693 | Density measuring balance | — | 1982-01-19 |
| 4299118 | Viscometer | Gerald S. Gau | 1981-11-10 |