Payson M. Butler

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El Cajon, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Conjugate two-piece packing ring with limiter
- Patent number 4,230,325
- Issue date Oct 28, 1980
- Payson M. Butler
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...