Document Type and Number:
Japanese Patent JPS5120766
Kind Code:
Y2
Application Number:
JP4283672U
Publication Date:
May 29, 1976
Filing Date:
April 11, 1972
Export Citation:
International Classes:
G03B9/28; G03B7/083; G03B9/08; G03B9/32; (IPC1-7): G03B9/08