Document Type and Number:
Japanese Patent JPS51156840
Kind Code:
U
Application Number:
JP7787575U
Publication Date:
December 14, 1976
Filing Date:
June 09, 1975
Export Citation:
International Classes:
G03B23/02; G03B1/00; G11B31/00; (IPC1-7): G03B23/02; G03B1/00; G11B31/00