Document Type and Number:
Japanese Patent JPS5438189
Kind Code:
Y2
Application Number:
JP3761875U
Publication Date:
November 14, 1979
Filing Date:
March 20, 1975
Export Citation:
International Classes:
G03B23/02; G11B23/08; G11B23/28; G11B23/30; (IPC1-7): G11B23/28