Document Type and Number:
Japanese Patent JPS518002
Kind Code:
B2
Application Number:
JP6114371A
Publication Date:
March 12, 1976
Filing Date:
August 12, 1971
Export Citation:
International Classes:
G03B31/06; G03B31/02; G11B7/00; G11B7/003; (IPC1-7): G11B7/00; G03B31/02