Document Type and Number:
Japanese Patent JPS5118752
Kind Code:
Y2
Application Number:
JP8469471U
Publication Date:
May 18, 1976
Filing Date:
September 14, 1971
Export Citation:
International Classes:
G03B31/06; G03B31/00; G11B21/02; G11B21/04; (IPC1-7): G11B21/04