Title:
【考案の名称】新そろばん
Document Type and Number:
Japanese Patent JP3021914
Kind Code:
U
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Inventors:
Miyoko Yuasa
Application Number:
JP435395U
Publication Date:
March 12, 1996
Filing Date:
March 30, 1995
Export Citation:
Assignee:
Miyoko Yuasa
International Classes:
(IPC1-7): G06C1/00