SR

Stephen G. Ratkowski

AE Autoclave Engineers: 2 patents #8 of 18Top 45%
Overall (All Time): #2,339,131 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4778150 Non-rotating stem valve Robert B. Pratt, Donald J. Kalivoda 1988-10-18
4466276 Consistometer Robert F. Ruyak, Samuel D. Ciprich, Theodore R. Silver 1984-08-21