Document Type and Number:
Japanese Patent JPS5214425
Kind Code:
Y2
Application Number:
JP5929972U
Publication Date:
April 01, 1977
Filing Date:
May 20, 1972
Export Citation:
International Classes:
G03B23/02; G11B23/06; G11B23/40; G11B23/42; G11B23/44; (IPC1-7): G11B23/06; G03B23/02; G11B23/40; G11B23/42