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发明名称
MULTIFREQUENCY SIGNAL RECEIVER
摘要
申请公布号
US3539731(A)
申请公布日期
1970.11.10
申请号
USD3539731
申请日期
1968.11.05
申请人
BELL TELEPHONE LAB. INC.
发明人
ZENON LEGEDZA
分类号
H04Q1/453;(IPC1-7):H04M1/50;H04Q9/12
主分类号
H04Q1/453
代理机构
代理人
主权项
地址
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