4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Optical or pre-photocell system

Tatsushi Yonezawa

Inventor

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Contactless switch having translating focusing/defocusing lens

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent

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Hand-operated switch

Equipment for production – distribution – or transformation of ene – Distribution – modification or control – Switch or casing therefor
Design Patent

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Single manipulation unit switching device

Electricity: circuit makers and breakers – Multiple circuit control – Pivoted contact
Reexamination Certificate

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Switching device

Electricity: circuit makers and breakers – Snap – Double snap
Patent

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Profile ID: LFUS-PAI-P-649474

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