Robert H. Welker

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Bellaire, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Dual injector cylinder automatic insertion device for use with high...
- Patent number 5,936,168
- Issue date Aug 10, 1999
- Robert H. Welker
- G01 - MEASURING TESTING
Information Patent Grant
Insertion regulator for pressurized pipelines
- Patent number 4,346,611
- Issue date Aug 31, 1982
- Robert H. Welker
- G01 - MEASURING TESTING
Information Patent Grant
Disc chart paper with reinforced separating edge
- Patent number 4,224,629
- Issue date Sep 23, 1980
- Robert H. Welker
- G01 - MEASURING TESTING
Information Patent Grant
Sensor positioning apparatus
- Patent number 4,177,676
- Issue date Dec 11, 1979
- Robert H. Welker
- G01 - MEASURING TESTING