Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802274 | Method of determining worn rotary tool | Robert C. Petrof | 1989-02-07 |
CM
Charles O. McHugh
Overall (1989): #125,966 of 140,708Top 90%
1
Patents 1989