DP

Dave L. Perry

YF Young & Franklin: 1 patents #4 of 10Top 40%
Overall (All Time): #3,869,080 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4989642 Throttling valve Harold H. Hopkinson, Caldwell Jones, John D. Moeller, Gabriel Silva 1991-02-05