Inventor · disambiguated record
Stefan Sponagel
Also filed as: SPONAGEL STEFAN
3 granted patents·37 citations·filing 1987–1992
70Inventor score
Files withFREUDENBERG CARL FA3
Top patents by PatentIndex Score
3 records- 0154US5143385AShaft sealFREUDENBERG CARL FA·Filed 1992·Granted Sep 1, 1992·24 cites·6 claims
- 0236US4861536AMethod for manufacturing a sealing ringFREUDENBERG CARL FA·Filed 1987·Granted Aug 29, 1989·7 cites·7 claims
- 0334US4850097AMethod for the manufacture of a sealing ring with a sealing lip having hydrodynamically acting return elementsFREUDENBERG CARL FA·Filed 1987·Granted Jul 25, 1989·6 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →