4. Optical: systems and elements
  5. Lens
  6. With variable magnification

Hideki Yamaoka

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Collapsible lens barrel and imaging device

Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate

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Collapsible lens barrel and imaging device

Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate

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Lens-barrel and image pickup apparatus

Television – Camera – system and detail – Optics
Reexamination Certificate

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Optical unit and imaging device

Photography – Having variable focal length of camera objective – Power zoom
Reexamination Certificate

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