Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9211939 | Anchor for boats | Rainer Kuenzel | 2015-12-15 |
| 8905162 | High efficiency hydraulic drill bit | — | 2014-12-09 |
| 7665547 | Drill bit reservoir with controllable relief pressure | Zhou Yong, George Witman | 2010-02-23 |
| 6508311 | Apparatus, system and method for installing and retrieving pipe in a well | — | 2003-01-21 |
| 6334376 | Mechanical torque amplifier | — | 2002-01-01 |
| 6250395 | Apparatus system and method for installing and retrieving pipe in a well | — | 2001-06-26 |
| 6231712 | Note sheet with pressure-sensitive adhesive and method of fabrication | — | 2001-05-15 |
| 5992801 | Pipe gripping assembly and method | — | 1999-11-30 |
| 5965225 | Note sheet with pressure-sensitive adhesive and method of fabrication | — | 1999-10-12 |
| 4938109 | Torque hold system and method | Wesley L. Leggett, Jay K. Thomas | 1990-07-03 |
| 4309899 | Equipment holder | — | 1982-01-12 |