Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7703560 | Cutting element with canted interface surface and bit body incorporating the same | Ronald K. Eyre, Madapusi K. Keshavan | 2010-04-27 |
| 7461709 | Multiple diameter cutting elements and bits incorporating the same | Madapusi K. Keshavan, Michael G. Azar | 2008-12-09 |
| 7451837 | Advanced expandable reaming tool | Carl M. Hoffmaster, Timothy P. Beaton | 2008-11-18 |
| 7451836 | Advanced expandable reaming tool | Carl M. Hoffmaster, Timothy P. Beaton | 2008-11-18 |
| 7395885 | Cutting element with canted interface surface and bit body incorporating the same | Ronald K. Eyre, Madapusi K. Keshavan | 2008-07-08 |
| 7165636 | Cutting element with canted interface surface and bit body incorporating the same | Ronald K. Eyre, Madapusi K. Keshavan | 2007-01-23 |
| 7017677 | Coarse carbide substrate cutting elements and method of forming the same | Madapusi K. Keshavan, Anthony Griffo, Dah-Ben Liang | 2006-03-28 |
| 6991049 | Cutting element | Ronald K. Eyre, Madapusi K. Keshavan | 2006-01-31 |
| 6883622 | Method for drilling a wellbore using a bi-center drill bit | Timothy P. Beaton, Thomas L. Young | 2005-04-26 |
| 6880650 | Advanced expandable reaming tool | Carl M. Hoffmaster, Timothy P. Beaton | 2005-04-19 |
| 6808031 | Drill bit having large diameter PDC cutters | Graham Mensa-Wilmot | 2004-10-26 |
| 6725953 | Drill bit having diamond impregnated inserts primary cutting structure | Thomas W. Oldham, Carl Edward Penuel, Duane R. Van Waes | 2004-04-27 |
| 6474425 | Asymmetric diamond impregnated drill bit | Timothy P. Beaton | 2002-11-05 |
| 6464024 | Bi-centered drill bit having improved drilling stability, mud hydraulics and resistance to cutter damage | Timothy P. Beaton | 2002-10-15 |
| 6405814 | Cutting element with canted design for improved braze contact area | Ronald K. Eyre, Madapusi K. Keshavan | 2002-06-18 |
| 6394202 | Drill bit having diamond impregnated inserts primary cutting structure | Thomas W. Oldham, Carl Edward Penuel, Duane R. Van Waes | 2002-05-28 |
| 6269893 | Bi-centered drill bit having improved drilling stability mud hydraulics and resistance to cutter damage | Timothy P. Beaton | 2001-08-07 |
| 6202772 | Cutting element with canted design for improved braze contact area | Ronald K. Eyre, Madapusi K. Keshavan | 2001-03-20 |
| 5947216 | Cutter assembly for rock bits with back support groove | Ghanshyam Rai, Stephen G. Southland, Gary R. Portwood | 1999-09-07 |
| 5944128 | Matrix hard facing by lost wax process | Douglas Caraway, Stephen M. Evans, Andrew Murdock | 1999-08-31 |
| 5833021 | Surface enhanced polycrystalline diamond composite cutters | Graham Mensa-Wilmot, Ghanshyam Rai, Madapusi K. Keshavan, Kuttaripalayam T. Kembaiyan | 1998-11-10 |
| 5732783 | In or relating to rotary drill bits | Douglas Caraway, Stephen M. Evans, Andrew Murdock | 1998-03-31 |
| 5667028 | Multiple diamond layer polycrystalline diamond composite cutters | Roger K. Brown | 1997-09-16 |
| 4749363 | Extension cord safety box | Robert Luska | 1988-06-07 |