using rotating members Vacuum gauges of the Langmuir type

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Patents Grantslast 30 patents

Information Patent Grant
Gas-friction vacuum indicator with a gas-friction sensor rotating a...
- Patent number 5,777,233
- Issue date Jul 7, 1998
- Forschungszentrum Julich GmbH
- Bernd Lindenau
- G01 - MEASURING TESTING
Information Patent Grant
Composite vacuum pump
- Patent number 5,092,740
- Issue date Mar 3, 1992
- Nippon Ferrofluidics Corporation
- Akira Yamamura
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Method for the processing of measurement data in a gas friction vac...
- Patent number 4,640,136
- Issue date Feb 3, 1987
- Leybold-Heraeus GmbH
- Lothar Schmidt
- G01 - MEASURING TESTING
Information Patent Grant
Gas friction vacuum meter and method of making measuring body
- Patent number 4,395,914
- Issue date Aug 2, 1983
- Kernforschungsanlage Julich GmbH
- Johan K. Fremerey
- G01 - MEASURING TESTING
Information Patent Grant
3744316
- Patent number 3,744,316
- Issue date Jul 10, 1973
- G01 - MEASURING TESTING