Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10677006 | Vibration assembly and method | Gunther HH von Gynz-Rekowski, Steven Samuel Mitchell, Russell Wayne Koenig, William Christian Herben | 2020-06-09 |
| 9915097 | Bearing section of a downhole drilling motor | Rory J. Mallard, Jr., Gerard T. Pittard | 2018-03-13 |
| 9546518 | Power section and transmission of a downhole drilling motor | Rory J. Mallard, Jr., Gerard T. Pittard | 2017-01-17 |
| 6457538 | Advanced coring apparatus and method | Gerard T. Pittard, J. Christopher Hetmaniak, William J. McDonald | 2002-10-01 |
| 6009960 | Coring tool | Clarence D. Edmonson, Gary W. Clemens, Terry P. Clifton | 2000-01-04 |
| 5624206 | Apparatus and method for supporting pipe main repair tools in an excavation | John H. Cohen, Gerard T. Pittard, Terry P. Clifton, Gerald Rockower | 1997-04-29 |
| 5467083 | Wireless downhole electromagnetic data transmission system and method | William J. McDonald, Gerard T. Pittard, Charles Grissom Steele, Karl F. Kiefer, Terry P. Clifton | 1995-11-14 |
| 5462077 | Apparatus and method for shutting off fluid flow in a pipe main | John H. Cohen, Gerard T. Pittard, Terry P. Clifton, Gerald Rockower | 1995-10-31 |
| 4991668 | Controlled directional drilling system and method | William A. Rehm, William J. McDonald, William C. Maurer | 1991-02-12 |
| 4880065 | Air motor operated rotary earth drilling tool | William J. McDonald, Michael R. Wasson, Gerard T. Pittard, William C. Maurer | 1989-11-14 |
| 4834193 | Earth boring apparatus and method with control valve | Michael R. Wasson, Douglas W. Lee, Gerald A. Stangl | 1989-05-30 |
| 4789032 | Orienting and circulating sub | William A. Rehm, William J. McDonald, William C. Maurer | 1988-12-06 |