Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4257741 | Turbine engine blade with airfoil projection | Robert K. Betts, John W. Zelahy | 1981-03-24 |
JG
John J. Grisik
Overall (All Time): #4,086,186 of 4,157,543Top 100%
1
Patents All Time