Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7172498 | Drill sharpener | William C. Christian, Scott James Harris, Keith Mosttler | 2007-02-06 |
| 6626745 | Precision drill sharpener and grinding wheel assembly therefor | — | 2003-09-30 |
| D411735 | Cable manager ring | Michael J. McGrath | 1999-06-29 |
| 5735732 | Precision drill sharpener and grinding wheel assembly therefor | — | 1998-04-07 |
| D385567 | Drill sharpening device | — | 1997-10-28 |
| 5400546 | Precision twist drill sharpener/point splitting machine | William C. Christian | 1995-03-28 |
| 4916866 | End mill sharpener | William C. Christian | 1990-04-17 |
| 4741226 | Power feed | William C. Christian | 1988-05-03 |
| 4485596 | Twist drill point splitting/web thinning apparatus | Richard A. Bernard, William C. Christian | 1984-12-04 |
| 4471581 | Universal twist drill sharpener apparatus | Arthur Alexander Bernard, Richard A. Bernard | 1984-09-18 |