Document Type and Number:
Japanese Patent JPS5552418
Kind Code:
Y2
Application Number:
JP11076076U
Publication Date:
December 05, 1980
Filing Date:
August 20, 1976
Export Citation:
International Classes:
G03B23/00; G03B21/00; G03B21/02; G03B23/04; (IPC1-7): G03B23/00; G03B21/02