RK

Roger W. Krause

JC John Crane: 2 patents #19 of 77Top 25%
Overall (All Time): #2,254,269 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5975538 Radial lip shaft seal Scott C. Spencer, Donald C. Ulrich 1999-11-02
5039112 Multi-layer lip seal assembly Donald C. Ulrich 1991-08-13