4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Photocell controls its own optical systems

Hisashi Tokumaru

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Camera having a varifocal lens

Patent

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Camera having a varifocal lens

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

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Camera having a varifocal lens

Photography – Camera detail – Lens mount
Patent

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Camera having a varifocal lens

Photography – Having variable focal length of camera objective – Having focus operation
Patent

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Camera having a varifocal lens

Patent

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