Teruyo Hayakawa

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Battery voltage detecting device

Electricity: measuring and testing – Electrolyte properties – Using a battery testing device
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Camera dual switch single data input-multiple data output device

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Camera having data protection means

Photography – Exposure data from film container – Electrical component on or in film container
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Flash photography changeover device

Patent

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Flash synchronizing device

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Profile ID: LFUS-PAI-P-754283

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