Inventor · disambiguated record
Hans-Otto Friedrichs
Also filed as: FRIEDRICHS HANS-OTTO
4 granted patents·24 citations·filing 1976–1997
73Inventor score
Technology areasE21D
Top patents by PatentIndex Score
4 records- 0157US4155675AHydraulic walking roof-support frameHEMSCHEIDT MASCHF HERMANN·Filed 1978·Granted May 22, 1979·10 cites·7 claims
- 0236US4155676AHydraulic walking roof-support frameHEMSCHEIDT MASCHF HERMANN·Filed 1978·Granted May 22, 1979·4 cites·12 claims
- 0333US4064701AHydraulic shield assemblyHEMSCHEIDT MASCHF HERMANN·Filed 1976·Granted Dec 27, 1977·3 cites·4 claims
- 0425US5961254AHydraulic advancing support frameDBT DEUTSCH BERGBAU TECHNIK GM·Filed 1997·Granted Oct 5, 1999·7 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →