Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7530407 | Rotary coring device and method for acquiring a sidewall core from an earth formation | Borislav J. Tchakarov, Quan V. Phan, David Ashcraft | 2009-05-12 |
| 7411388 | Rotary position sensor and method for determining a position of a rotating body | Borislav J. Tchakarov, Quan V. Phan | 2008-08-12 |