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Stefan Sponagel (3)
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1992
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1989
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Patent (3)
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Fachbereich Medizintechnik und Technomathematik (3)
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Method for the manufacture of a sealing ring with a sealing lip having hydrodynamically acting return elements : United States Patent 4,850,097 ; date of patent: Jul. 25, 1989 / assignee: Firma Carl Freudenberg. Inventors: Gunter Graf ; Heinz Gross ; Stefan Sponagel
(1989)
Stefan Sponagel
;
Günter Graf
;
Heinz Groß
Method for manufacturing a sealing ring : United States Patent 4,861,536 ; date of patent: Aug. 12, 1989 / assignee: Firma Carl Freudenberg. Inventors: Gunter Graf ; Heinz Gross ; Stefan Sponagel
(1989)
Stefan Sponagel
;
Günter Graf
;
Heinz Groß
Shaft seal : United States Patent 5,143,385 ; date of patent: Sep. 1, 1992 / assignee: Firma Carl Freudenberg
(1992)
Stefan Sponagel
;
Waldemar Wachowitz
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