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Rolf Karkowski

3M: 1 patents #7,233 of 11,543Top 65%

Neuss, DE: #274 of 530 inventorsTop 55%

Overall (All Time): #2,931,238 of 4,157,543Top 75%

1 Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
9570894	Non-return valve for a resin injection system and resin injection system incorporating same	Bernd Schubert, Werner Roehling	2017-02-14