Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6443249 | Rotary drill bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics | Christopher C. Beuershausen, Mark W. Dykstra, Roger Fincher, Roland Illerhaus, Steve R. Matson +2 more | 2002-09-03 |
| 6360208 | Method and apparatus for automatic tax verification | Paul A. Maltseff | 2002-03-19 |
| 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., Danny E. Scott, Rudolf Carl Pessier, Roland Illerhaus +3 more | 2001-11-27 |
| 6230828 | Rotary drilling bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics | Christopher C. Beuershausen, Mark W. Dykstra, Roger Fincher, Roland Illerhaus, Steve R. Matson +2 more | 2001-05-15 |
| 6199044 | Universal data input and processing device, such as universal point-of-sale device for inputting and processing bar code symbols, document images, and other data | H. Sprague Ackley, Pavel A. Maltsev | 2001-03-06 |
| 6112836 | Rotary drill bits employing tandem gage pad arrangement | John R. Spaar, James A. Norris, Christopher C. Beuershausen, Rudolf Carl Pessier, Roland Illerhaus +2 more | 2000-09-05 |
| 6109526 | Optical and passive electromagnetic reader for reading machine-readable symbols, such as bar codes, and reading wireless tags, such as radio frequency tags, and corresponding method | Pavel Maltseff | 2000-08-29 |
| 6006845 | Rotary drill bits for directional drilling employing tandem gage pad arrangement with reaming capability | Roland Illerhaus, Christopher C. Beuershausen, Mark W. Dykstra, James A. Norris, Rudolf Carl Pessier +1 more | 1999-12-28 |