Mammel; A. Dean

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Dallas, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Flange valve having improved sealing characteristics and wear indic...
- Patent number 4,233,926
- Issue date Nov 18, 1980
- Mammel; A. Dean
- Philip W. Rogers
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Flange valve having improved sealing characteristics and wear indic...
- Patent number 4,136,709
- Issue date Jan 30, 1979
- Mammel; A. Dean
- Philip W. Rogers
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Valve having ellipsoid valve member
- Patent number 4,124,036
- Issue date Nov 7, 1978
- Mammel; A. Dean
- Phillip W. Rogers
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...