Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819999 | End face seal assembly | Robert J. Purcell, Blair A. Maust | 1989-04-11 |
RL
Richard E. Livesay
Overall (1989): #65,679 of 140,708Top 50%
1
Patents 1989