Original Swiss Patents
Inventions by Dr. Armin H. Frei
Quartz Wristwatch Project
Centre Electronique Horloger CEH
Neuchâtel Switzerland (1965-1967)
Device with bending Oscillators for suspending X-Y-Bending-Quartz-Crystals in Timekeeping Devices (Miniaturisation of a Quartz Device)
Original Swiss Patent No. 461 382, 1966/1968
Inventor: Armin H. Frei
Capacitor with stepwise variable Capacitance in a Timekeeping Device
Original Swiss Patent No. 503 312, 1967/1971
Inventor: Armin H. Frei
Watch with electric Display Device and electric Timepiece
Original Interpretative Document
Swiss Patent Office No. 11746/66, 1966/1969
Inventor: Armin H. Frei
Original Swiss Patent No. 520 970, 1966/1972
Inventor: Armin H. Frei
Method of forming a soldered Joint
Original Swiss Patent No. 444 012, 1966/1967
Inventor: Armin H. Frei et al.
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Dr. Armin H. Frei Heritage Estate, Zurich Switzerland