Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6367568 | Steel tooth cutter element with expanded crest | Stephen C. Steinke, Gary R. Portwood, Gary E. Garcia, David P. Moran | 2002-04-09 |
| 6336512 | Drill bit having canted seal | Michael A. Siracki, Steven W. Peterson, Chris E. Cawthorne | 2002-01-08 |