Document Type and Number:
Japanese Patent JPS5251787
Kind Code:
Y2
Application Number:
JP9261972U
Publication Date:
November 25, 1977
Filing Date:
August 07, 1972
Export Citation:
International Classes:
G03B3/02; F21V5/04; G02B7/04; G02B7/10; G02B7/105; G02B7/28; G03B3/00; G03B13/32; G03B17/12; (IPC1-7): G02B7/10; G03B3/02