Robert F. Evans

FT Fci Americas Technology: 9 patents #39 of 275Top 15%

DO Docusys: 6 patents #1 of 4Top 25%

VM Varel Manufacturing: 6 patents #1 of 7Top 15%

EA E.I. Du Pont De Nemours And: 3 patents #2,229 of 8,010Top 30%

IF Infinity Fluids: 2 patents #2 of 2Top 100%

BT Berg Technology: 2 patents #65 of 189Top 35%

OL Oakville Stamping & Bending Limited: 2 patents #2 of 2Top 100%

SI Smith International: 1 patents #390 of 708Top 60%

Overall (All Time): #52,870 of 4,157,543Top 2%

Patents All Time

Issued Patents All Time

Showing 51–51 of 51 patents

Patent #	Title	Co-Inventors	Date
4193463	Drilling bit fluid-cooled friction bearing	—	1980-03-18