Document Type and Number:
Japanese Patent JPS57148224
Kind Code:
U
More Like This:
JP2009294437 | CALCULATION ON PAPER ASSISTING TOOL |
Application Number:
JP3352481U
Publication Date:
September 17, 1982
Filing Date:
March 12, 1981
Export Citation:
International Classes:
G09B19/02; G06C1/00; (IPC1-7): G06C1/00; G09B19/02