JP

John E. Peffer

DI Dresser Industries: 1 patents #301 of 787Top 40%
Overall (All Time): #3,614,824 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
6061637 Method of determining knock resistance rating for non-commercial grade natural gas Gregory Walter Sorge, Richard J. Kakoczki 2000-05-09