4. Photography
  5. Having variable focal length of camera objective
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Taking lens device

Photography – Having variable focal length of camera objective
Reexamination Certificate

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Taking lens drive unit

Photography – Having variable focal length of camera objective – Manually selected preset zoom position or range
Patent

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Telescoping type of zoom lens and cam mechanism therefor

Photography – Having variable focal length of camera objective
Patent

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Three-lens-unit zoom optical system

Photography – Having variable focal length of camera objective
Reexamination Certificate

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TV camera lens driving device and TV camera lens

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

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Two-focus switchable lens

Photography – Having variable focal length of camera objective – Lens moves in or out of light path
Reexamination Certificate

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Two-stage lens driving device

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

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