Schwartz; John E.

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Billings, MT, US

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Patents Grantslast 30 patents

Information Patent Grant
Internal valve for pressure fluid containment vessels
- Patent number 5,285,998
- Issue date Feb 15, 1994
- Montana Sulphur & Chemical Co.
- Donald L. Zink
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...