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发明名称
Impulse sender
摘要
申请公布号
US2251666(A)
申请公布日期
1941.08.05
申请号
US19370142573
申请日期
1937.05.14
申请人
TELEPHON-APPARAT FABRIK E. ZWIETUSCH AND COMPANY
发明人
DOHLE HINRICH
分类号
H04M1/272
主分类号
H04M1/272
代理机构
代理人
主权项
地址
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