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发明名称
Telephone system
摘要
申请公布号
US2277901(A)
申请公布日期
1942.03.31
申请号
US19390301657
申请日期
1939.10.27
申请人
FIDES GESELLSCHAFT FUR DIE VERWALTUNG UND VERWERTUNG VON GEWERBLICHEN SCHUTZRECHTEN MIT BESCHRANKTER HAFTUNG
发明人
BRANDSTETTER ALOIS
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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