Issued Patents All Time
Showing 126–150 of 171 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6332503 | Fixed cutter bit with chisel or vertical cutting elements | Rudolf Carl Pessier, Matthias Meister, Ronny D. McCormick | 2001-12-25 |
| 6328117 | Drill bit having a fluid course with chip breaker | Sean K. Berzas, Ralf Duerholt, Rudolf Carl Pessier | 2001-12-11 |
| 6321862 | Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability | Christopher C. Beuershausen, Robert J. Costo, Jr., Rudolf Carl Pessier, Roland Illerhaus, Mark W. Dykstra +3 more | 2001-11-27 |
| 6290007 | Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability | Christopher C. Beuershausen, Robert J. Costo, Jr., Rudolf Carl Pessier | 2001-09-18 |
| 6260636 | Rotary-type earth boring drill bit, modular bearing pads therefor and methods | Craig H. Cooley, Wayne R. Hansen, Brian E. Miller, Daniel Beeman | 2001-07-17 |
| 6220375 | Polycrystalline diamond cutters having modified residual stresses | Trent N. Butcher, Ralph M. Horton, Stephen R. Jurewicz, Redd H. Smith | 2001-04-24 |
| RE37127 | Hardfacing composition for earth-boring bits | Kevin W. Schader, James L. Overstreet, Alan J. Massey, Ronald L. Jones | 2001-04-10 |
| 6209185 | Earth-boring bit with improved rigid face seal | — | 2001-04-03 |
| 6202771 | Cutting element with controlled superabrasive contact area, drill bits so equipped | Redd H. Smith, Ralph M. Horton, Arthur A. Chaves | 2001-03-20 |
| 6135219 | Earth-boring bit with super-hard cutting elements | — | 2000-10-24 |
| 6105694 | Diamond enhanced insert for rolling cutter bit | — | 2000-08-22 |
| 6098730 | Earth-boring bit with super-hard cutting elements | Rudolf Carl Pessier, Robert J. Farr, Stephen R. Jurewicz, Kenneth M. Jensen, Paul Douglas Jones | 2000-08-08 |
| 6068070 | Diamond enhanced bearing for earth-boring bit | — | 2000-05-30 |
| 6065552 | Cutting elements with binderless carbide layer | James L. Overstreet | 2000-05-23 |
| 6050354 | Rolling cutter bit with shear cutting gage | Rudolf Carl Pessier, Robert E. Grimes | 2000-04-18 |
| 6045029 | Earth-boring bit with improved rigid face seal | — | 2000-04-04 |
| 5996713 | Rolling cutter bit with improved rotational stabilization | Rudolf Carl Pessier, John Vanderstaay Kenner, Matthew R. Isbell, Mohammad Swadi | 1999-12-07 |
| 5979571 | Combination milling tool and drill bit | Jack T. Oldham, Gerald D. Lynde, Greg Nazzal, Roy Swanson, Brad Randall +1 more | 1999-11-09 |
| 5960896 | Rotary drill bits employing optimal cutter placement based on chamfer geometry | David H. Barr, Craig H. Cooley | 1999-10-05 |
| 5954147 | Earth boring bits with nanocrystalline diamond enhanced elements | James L. Overstreet | 1999-09-21 |
| 5890552 | Superabrasive-tipped inserts for earth-boring drill bits | Rudolf Carl Pessier | 1999-04-06 |
| 5855247 | Rolling-cutter earth-boring bit having predominantly super-hard cutting elements | Amy J.G. Jurewicz, Stephen R. Jurewicz | 1999-01-05 |
| 5819861 | Earth-boring bit with improved cutting structure | Rudolf Carl Pessier | 1998-10-13 |
| 5758733 | Earth-boring bit with super-hard cutting elements | Rudolf Carl Pessier, Robert J. Farr, Stephen R. Jurewicz, Kenneth M. Jensen, Paul Douglas Jones | 1998-06-02 |
| 5752573 | Earth-boring bit having shear-cutting elements | Rudolf Carl Pessier | 1998-05-19 |