Document Type and Number:
Japanese Patent JPS53133746
Kind Code:
U
Application Number:
JP4000877U
Publication Date:
October 23, 1978
Filing Date:
March 30, 1977
Export Citation:
International Classes:
H04B10/27; G02B6/28; G02B27/10; H04B10/25; H04B10/29; (IPC1-7): G02B27/10; G02B5/14; H04B9/00