Friedhelm Doll

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Wermelskirchen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Inductive flow meter
- Patent number 5,808,208
- Issue date Sep 15, 1998
- AMJ Equipment Corporation
- Friedhelm Doll
- G01 - MEASURING TESTING
Information Patent Grant
Inductive flow meter
- Patent number 5,641,914
- Issue date Jun 24, 1997
- Friedhelm Doll
- G01 - MEASURING TESTING
Information Patent Grant
Inductive flow meter
- Patent number 5,400,660
- Issue date Mar 28, 1995
- Turbo-Werk Messtechnik GmbH
- Friedhelm Doll
- G01 - MEASURING TESTING
Information Patent Grant
Inductive flow meter
- Patent number 5,018,391
- Issue date May 28, 1991
- Turbo-Werk Messtechnik GmbH
- Friedhelm Doll
- G01 - MEASURING TESTING
Information Patent Grant
Circuit for changing a periodic intelligence signal into a direct-c...
- Patent number 4,733,191
- Issue date Mar 22, 1988
- Turbo-Werk Messtechnik GmbH
- Friedhelm Doll
- G01 - MEASURING TESTING
Information Patent Grant
Measuring device for the magneto-inductive measuring of the flow ra...
- Patent number 4,554,828
- Issue date Nov 26, 1985
- Turbo-Werk Messtechnik GmbH
- Friedhelm Doll
- G01 - MEASURING TESTING
Information Patent Grant
Inductive flow meter
- Patent number 4,157,035
- Issue date Jun 5, 1979
- Friedhelm Doll
- G01 - MEASURING TESTING