Document Type and Number:
Japanese Patent JPS4872871
Kind Code:
U
Application Number:
JP11785071U
Publication Date:
September 11, 1973
Filing Date:
December 15, 1971
Export Citation:
International Classes:
G10K9/22; G10K9/12; G10K9/15; G10K9/18; (IPC1-7): G10K9/18