Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8065935 | Method of manufacturing a rotary drill bit | L. Richard Borremans, Robert J. Costo, Jr., James L. Duggan | 2011-11-29 |
| 8011456 | Rotationally indexable cutting elements and drill bits therefor | — | 2011-09-06 |
| 7694755 | System, method, and apparatus for variable junk slot depth in drill bit body to alleviate balling | Timothy K. Marvel, David A. Trivas, Michael R. Wells | 2010-04-13 |
| 7520345 | Fixed cutter rotary drill bit including support elements affixed to the bit body at least partially defining cutter pocket recesses | L. Richard Borremans, Robert J. Costo, Jr., James L. Duggan | 2009-04-21 |
| 7216565 | Methods of manufacturing and repairing steel body rotary drill bits including support elements affixed to the bit body at least partially defining cutter pocket recesses | L. Richard Borremans, Robert J. Costo, Jr., James L. Duggan | 2007-05-15 |
| 7070011 | Steel body rotary drill bits including support elements affixed to the bit body at least partially defining cutter pocket recesses | L. Richard Borremans, Robert J. Costo, Jr., James L. Duggan | 2006-07-04 |
| 6302224 | Drag-bit drilling with multi-axial tooth inserts | — | 2001-10-16 |
| 6148427 | Method and apparatus for test data generation | Michael Kantrowitz, David Asher | 2000-11-14 |
| 5878054 | Method and apparatus for test data generation | Michael Kantrowitz, David Asher | 1999-03-02 |
| 5558170 | Method and apparatus for improving drill bit stability | Gary M. Thigpen, Coy M. Fielder | 1996-09-24 |
| 5449048 | Drill bit having chip breaker polycrystalline diamond compact and hard metal insert at gauge surface | Gary M. Thigpen, Coy M. Fielder | 1995-09-12 |
| 5333699 | Drill bit having polycrystalline diamond compact cutter with spherical first end opposite cutting end | Gary M. Thigpen | 1994-08-02 |
| 4767300 | Apparatus for precision volumetric control of a moldable material in an injection molding process | Frederick J. Buja, Alan B. Miller, James J. Wenskus, Jr. | 1988-08-30 |
| 4767579 | Method of precision volumetric control of a moldable material in an injection molding process | Frederick J. Buja, Alan B. Miller, James J. Wenskus, Jr. | 1988-08-30 |