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发明名称
KEY CARD OPERATED SWITCH AND SYSTEM
摘要
申请公布号
CA797424(A)
申请公布日期
1968.10.22
申请号
CAD797424
申请日期
申请人
EMHART CORPORATION
发明人
NICHOLAS A. WELCH
分类号
主分类号
代理机构
代理人
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地址
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