4. Horology: time measuring systems or devices
  5. Chronological
  6. With electro-optical display

Singo Ichikawa

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Analog quartz timepiece

Horology: time measuring systems or devices – Chronological – With manually actuated display
Patent

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Analog quartz timepiece

Patent

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Control circuit for electronic timepiece

Patent

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DC-to-DC Voltage converter

Electrical transmission or interconnection systems – Capacitor – Parallel-charge – series-discharge
Patent

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Electronic calculator watch

Horology: time measuring systems or devices – Combined with disparate device
Patent

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Profile ID: LFUS-PAI-P-430007

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