Willi Frei

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Sennwald, CH

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Patents Grantslast 30 patents

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Pneumatic drive for switching elements and control elements
- Patent number 4,414,882
- Issue date Nov 15, 1983
- Vat Aktiengesellschaft fur Vakuum-Apparate-Technik
- Willi Frei
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...