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发明名称
ELECTRICAL DIFFERENTIATOR
摘要
申请公布号
CA451715(A)
申请公布日期
1948.10.05
申请号
CAD451715
申请日期
申请人
BELL TELEPHONE LABORATORIES;WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
HENRY G. OCH;KARL D. SWARTZEL, JR.
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