Document Type and Number:
Japanese Patent JPS5221881
Kind Code:
Y2
Application Number:
JP7026471U
Publication Date:
May 19, 1977
Filing Date:
August 05, 1971
Export Citation:
International Classes:
H05K1/18; H05K1/02; H05K3/30; (IPC1-7): H05K1/02; H05K3/30