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发明名称
MINIATURIZED HELMET EXPONENTIAL HORN SPEAKER
摘要
申请公布号
CA765475(A)
申请公布日期
1967.08.15
申请号
CAD765475
申请日期
申请人
GENERAL MOTORS CORPORATION
发明人
MAURICE J. WHITTEMORE, JR.;DONALD E. BRINKERHOFF
分类号
主分类号
代理机构
代理人
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