Document Type and Number:
Japanese Patent JPS5312197
Kind Code:
Y2
Application Number:
JP12724373U
Publication Date:
April 03, 1978
Filing Date:
November 05, 1973
Export Citation:
International Classes:
G03B21/132; G03B21/02; G03B23/02; G03B23/06; (IPC1-7): G03B23/06