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发明名称
Deposit-controlled timing system for telephony
摘要
申请公布号
US2623950(A)
申请公布日期
1952.12.30
申请号
US19480048188
申请日期
1948.09.08
申请人
TELEFON FABRIK AUTOMATIC A/S
发明人
UNGAR ERNEST
分类号
H04M15/10;H04M17/02
主分类号
H04M15/10
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代理人
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