Quin D. Kroll

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Liquid level controller
- Patent number 4,700,738
- Issue date Oct 20, 1987
- Dover Resources, Inc.
- John J. Frese
- G05 - CONTROLLING REGULATING
Information Patent Grant
Liquid level control having improved instrument air valve
- Patent number 4,543,979
- Issue date Oct 1, 1985
- Dover Corporation
- Daniel C. Olmsted
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...