DV

David J. Vavra

RI Ritchie Industries: 1 patents #4 of 11Top 40%
Overall (All Time): #3,674,166 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5709170 Animal alignment guide for a nipple valve waterer Michael R. Gerbo 1998-01-20