Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6836697 | Method of determining cutting forces, and a calculator operating in accordance with the method | — | 2004-12-28 |
| 6267541 | Indexable insert with a V-shaped chip breaker | Earl L. Griffin, James G. Hutchens | 2001-07-31 |
| 4903609 | Tamping blade with improved inserts | Terry A. Manway | 1990-02-27 |
| 4770253 | Grader blade with tiered inserts on leading edge | Robert P. Hallissy, John F. Kita, Earle W. Stephenson | 1988-09-13 |
| 4716976 | Rotary percussion drill bit | — | 1988-01-05 |
| 4715450 | Grader blade with casting/insert assembly on leading edge | Robert P. Hallissy, Earle W. Stephenson, Don C. Rowlett | 1987-12-29 |
| 4550791 | Two-prong rotary bit, especially for use with roof drills, and insert therefor | — | 1985-11-05 |