Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7857076 | Force balancing system for use with a well bore tool | Huy D. Bui, Brooks Howard Javins | 2010-12-28 |
| 6131672 | Percussive down-the-hole rock drilling hammer and piston therefor | Rainer Beccu, Matt Shofner | 2000-10-17 |
| 6062322 | Precussive down-the-hole rock drilling hammer | Rainer Beccu, Matt Shoffner | 2000-05-16 |
| 5407021 | Down-the-hole hammer drill having reverse circulation | Robert F. Kane, Matthew Floyd Shofner, Faisal J. Yousef | 1995-04-18 |