Document Type and Number:
Japanese Patent JPS50138027
Kind Code:
U
Application Number:
JP6073174U
Publication Date:
November 13, 1975
Filing Date:
May 27, 1974
Export Citation:
International Classes:
G03B21/132; G03B21/00; G03B21/14; G03B21/32; (IPC1-7): G03B21/32; G03B21/14