Dennis M. Riddleberger

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Portsmouth, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Double-acting inflatable seal
- Patent number 4,342,336
- Issue date Aug 3, 1982
- J. Glenn Satterthwaite
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Closure device with peripheral double acting inflatable seal
- Patent number 4,250,926
- Issue date Feb 17, 1981
- J. Glenn Satterthwaite
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...