Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867253 | Dampener for impacting mechanism | Larry G. Eftefield | 1989-09-19 |
| 4852662 | Impacting mechanism | Raymond A. Bianchi, David Kistner, Joseph Oswald | 1989-08-01 |
EP
Elmer B. Phelps
Overall (1989): #28,338 of 140,708Top 25%
2
Patents 1989