Login| Sign Up| Help| Contact|

Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5639445
Kind Code:
B2
Application Number:
JP3665477A
Publication Date:
September 12, 1981
Filing Date:
March 31, 1977
Export Citation:
Click for automatic bibliography generation   Help
International Classes:
G02B6/24; G02B6/255; H02G15/08