37 Utility Patents
#1 in Grafenberg
#2,914 in Germany
#65,259 in the World
Forward Citations = 279
Company Filing History:
Hydraulik-ring Gmbh
Hydraulik-ring Antriebs-und Steuerungstechnik Gmbh

4. 3 out of 832,492 patents
Other
5. 1 out of 3
H.c.f. Porsche Aktiengesellschaft
where one patent can have more than one assignee
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