Donald A. Levengood

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Silver Lake, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
High pressure inverted bellows valve
- Patent number 4,634,099
- Issue date Jan 6, 1987
- Nupro Company
- Oliver L. Danko
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...