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发明名称
DIRECTIONAL ANTENNA
摘要
申请公布号
CA404318(A)
申请公布日期
1942.04.21
申请号
CAD404318
申请日期
申请人
BELL TELEPHONE LABORATORIES;WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
ALFRED CHARLES BECK;HAROLD TRAP FRIIS
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主分类号
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