Title:
大型そろばん
Document Type and Number:
Japanese Patent JP3176373
Kind Code:
U
Inventors:
Shigeo Nakahara
Application Number:
JP2012000833U
Publication Date:
June 21, 2012
Filing Date:
January 31, 2012
Export Citation:
Assignee:
Shigeo Nakahara
International Classes:
G06C1/00; G09B19/02