Title:
【考案の名称】裏張りをしたそろばん
Document Type and Number:
Japanese Patent JPS5815233
Kind Code:
U
Inventors:
Ken Kane
Application Number:
JP10649281U
Publication Date:
January 31, 1983
Filing Date:
July 16, 1981
Export Citation:
International Classes:
G06C1/00; (IPC1-7): G06C1/00