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发明名称
Stylus for recording electrical impulses on carbon coated paper
摘要
申请公布号
US2867491(A)
申请公布日期
1959.01.06
申请号
US19560623510
申请日期
1956.11.20
申请人
NELSON MILES E
发明人
NELSON MILES E.
分类号
H04N1/032
主分类号
H04N1/032
代理机构
代理人
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地址
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