Matti O. Pyysalo

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Helsinki, FI

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Patents Grantslast 30 patents

Information Patent Grant
Ball valve assembly with expandable valve element
- Patent number 4,556,197
- Issue date Dec 3, 1985
- Neles Inc.
- Peter G. Kindersley
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...