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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS58120990
Kind Code:
U
Application Number:
JP1672782U
Publication Date:
August 17, 1983
Filing Date:
February 08, 1982
Export Citation:
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International Classes:
G10K9/12; G04C21/02; G10K9/13; H04R11/02; H04R13/00; (IPC1-7): G04C21/02; G10K9/12; H04R11/02
Domestic Patent References:
JPS564087A1981-01-16
JPS5146975A1976-04-22