Title:
【考案の名称】くり上がり,くり下がり説明教具
Document Type and Number:
Japanese Patent JPS5995374
Kind Code:
U
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Inventors:
Kamikatsu Tokumitsu
Application Number:
JP18125082U
Publication Date:
June 28, 1984
Filing Date:
November 29, 1982
Export Citation:
International Classes:
G09B19/02; (IPC1-7): G09B19/02