DS

David B. Sawyer

SI Sigma-Tek: 1 patents #6 of 7Top 90%
Overall (All Time): #3,816,023 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5181844 Rotary vane pump with carbon/carbon vanes Jerry B. Bishop, Francis A. Schwind 1993-01-26