Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6009960 | Coring tool | Curtis E. Leitko, Jr., Clarence D. Edmonson, Gary W. Clemens | 2000-01-04 |
| 5641909 | Scan assembly structure | Karl F. Kiefer, Gerard T. Pittard, Donald Chaffee, C. Grissom Steele | 1997-06-24 |
| 5624206 | Apparatus and method for supporting pipe main repair tools in an excavation | John H. Cohen, Curtis E. Leitko, Jr., Gerard T. Pittard, 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, Curtis E. Leitko, Jr. | 1995-11-14 |
| 5462077 | Apparatus and method for shutting off fluid flow in a pipe main | John H. Cohen, Curtis E. Leitko, Jr., Gerard T. Pittard, Gerald Rockower | 1995-10-31 |
| 5277055 | Impact and impact-rotary tool testing apparatus using rotary speed and impact energy | Gerard T. Pittard, William J. McDonald, William Christian Herben | 1994-01-11 |