Document Type and Number:
Japanese Patent JPS4218621
Kind Code:
Y1
Application Number:
JP332766U
Publication Date:
October 27, 1967
Filing Date:
January 18, 1966
Export Citation:
International Classes:
G03B31/00; G11B7/00; G11B7/003; (IPC1-7): G03B31/00; G11B7/00
Previous Patent: JPS4218620
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