Title:
【考案の名称】携帯用折りたたみ式そろばん
Document Type and Number:
Japanese Patent JPS582032
Kind Code:
U
Inventors:
Toshihide Yamada
Application Number:
JP9203781U
Publication Date:
January 07, 1983
Filing Date:
June 22, 1981
Export Citation:
International Classes:
G06C1/00; (IPC1-7): G06C1/00
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