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发明名称
Indicating apparatus and method
摘要
申请公布号
US2398046(A)
申请公布日期
1946.04.09
申请号
US19420427353
申请日期
1942.01.19
申请人
THE HARRY ALTER COMPANY
发明人
SCHAEFER HAROLD W.
分类号
H03K21/02
主分类号
H03K21/02
代理机构
代理人
主权项
地址
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