Waldemar Friesenhahn

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Kornwestheim, DE

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Patents Grantslast 30 patents

Information Patent Grant
Valve housing with embedded electrical leads
- Patent number 6,644,619
- Issue date Nov 11, 2003
- Behr Thermot-Tronik GmbH
- Waldemar Friesenhahn
- G05 - CONTROLLING REGULATING
Information Patent Grant
Thermostat valve with electrically heatable operating element
- Patent number 6,601,544
- Issue date Aug 5, 2003
- Behr Thermot-Tronik GmbH
- Waldemar Friesenhahn
- G05 - CONTROLLING REGULATING

Patents Applicationslast 30 patents

Information Patent Application
HEAT EXCHANGER, PARTICULARLY FOR A MOTOR VEHICLE
- Publication number 20100051255
- Publication date Mar 4, 2010
- BEHR GmbH & CO. KG
- Karsten Emrich
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Application
Valve housing with embedded electrical leads
- Publication number 20020070367
- Publication date Jun 13, 2002
- Waldemar Friesenhahn
- G05 - CONTROLLING REGULATING
Information Patent Application
Thermostat valve with electrically heatable operating element
- Publication number 20020059906
- Publication date May 23, 2002
- Waldemar Friesenhahn
- G05 - CONTROLLING REGULATING