Inventor · disambiguated record
Michael Friedrichs
Also filed as: FRIEDRICHS MICHAEL
7 granted patents·48 citations·filing 1982–2010
83Inventor score
Top patents by PatentIndex Score
7 records- 0161US8539975B2Drill string valve and methodSCHROEDER DERRYL·Filed 2009·Granted Sep 24, 2013·9 cites·18 claims
- 0257US4719958AMethod, apparatus and feeder sleeves for the production of casting mouldsFOSECO INT·Filed 1986·Granted Jan 19, 1988·9 cites·20 claims
- 0356US8727040B2Drill string valve and methodSCHROEDER DERRYL·Filed 2010·Granted May 20, 2014·2 cites·14 claims
- 0456US4727757AFerro-magnetic foil for a torque sensorVACUUMSCHMELZE GMBH·Filed 1987·Granted Mar 1, 1988·14 cites·9 claims
- 0553US4507651AContact-free push-button key for generating an electrical signal upon depression thereofVACUUMSCHMELZE GMBH·Filed 1982·Granted Mar 26, 1985·9 cites·13 claims
- 0634US6960912B2Magnetic field sensor deviceVACUUMSCHMELZE GMBH & CO KG·Filed 2003·Granted Nov 1, 2005·2 cites·11 claims
- 0730US4703550AMethod for manufacturing a torque sensorVACUUMSCHMELZE GMBH·Filed 1986·Granted Nov 3, 1987·3 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →