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  • Publication Date: October 13, 1988
  • Publication Number: JP-S6338856-Y2

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    Patent Citations (2)

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      JP-H0513787-UFebruary 23, 1993セーラー万年筆株式会社筆記具
      JP-S552439-AJanuary 09, 1980Kunio AoyamaPillow

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