Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7431107 | Coring bit with uncoupled sleeve | Bunker Hill, Gary W. Contreras, Edward Harrigan, Robert W. Sundquist, Lennox Reid +1 more | 2008-10-07 |
| 6729416 | Method and apparatus for retaining a core sample within a coring tool | Gary W. Contreras, Edward Harrigan, Bunker Hill, Robert W. Sundquist, Sony Tran | 2004-05-04 |
| 6412575 | Coring bit and method for obtaining a material core sample | Edward Harrigan, Robert W. Sundquist, Bunker Hill, Gary W. Contreras, Sony Tran | 2002-07-02 |
| 6371221 | Coring bit motor and method for obtaining a material core sample | Edward Harrigan, Gary W. Contreras, Bunker Hill, Robert W. Sundquist, Sony Tran | 2002-04-16 |