4. Optical: systems and elements
  5. Light control by opaque element or medium movable in or...
  6. With rotating or pivoting element
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Light amount control apparatus, photographing apparatus, and...

Optical: systems and elements – Light control by opaque element or medium movable in or... – With rotating or pivoting element
Reexamination Certificate

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Light controlling apparatus

Optical: systems and elements – Light control by opaque element or medium movable in or... – With rotating or pivoting element
Reexamination Certificate

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Light quantity control device

Optical: systems and elements – Light control by opaque element or medium movable in or... – With rotating or pivoting element
Reexamination Certificate

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Light-amount adjusting apparatus, optical apparatus, and...

Optical: systems and elements – Light control by opaque element or medium movable in or... – With rotating or pivoting element
Reexamination Certificate

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