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  • Publication Date: May 07, 1991
  • Publication Number: JP-H0320827-Y2

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    Patent Citations (2)

      Publication numberPublication dateAssigneeTitle
      JP-S56133756-AOctober 20, 1981Asahi Optical Co LtdOptical device for variable magnification copying capable of size enlarging and reducing
      JP-S5768873-AApril 27, 1982Asahi Optical Co LtdVariable scale factor copying optical device which is capable of magnification and reduction

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