Document Type and Number:
Japanese Patent JPS50134641
Kind Code:
A
Application Number:
JP4099174A
Publication Date:
October 24, 1975
Filing Date:
April 15, 1974
Export Citation:
International Classes:
G09B5/06; G03B31/04; G09B19/00; (IPC1-7): G03B31/04; G09B19/00