DU

Donald C. Ulrich

JC John Crane: 3 patents #12 of 77Top 20%
📍 Collinsville, IL: #27 of 115 inventorsTop 25%
🗺 Illinois: #26,653 of 84,256 inventorsTop 35%
Overall (All Time): #1,635,515 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5975538 Radial lip shaft seal Roger W. Krause, Scott C. Spencer 1999-11-02
5957461 Radial lip shaft seal 1999-09-28
5039112 Multi-layer lip seal assembly Roger W. Krause 1991-08-13