Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6651756 | Steel body drill bits with tailored hardfacing structural elements | Robert J. Costo, Jr., James L. Overstreet, Anton F. Zahradnik, James L. Duggan, Russel S. Smith | 2003-11-25 |