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Patent Searching and Data

Document Type and Number:
Japanese Patent JPS57198146
Kind Code:
Application Number:
Publication Date:
December 16, 1982
Filing Date:
June 12, 1981
Export Citation:
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International Classes:
H04B3/02; H04B3/00; H04L25/02; H04L25/03; (IPC1-7): H04L25/02; H04B3/00

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