Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |