CENTRAL BATTERY TELEPHONE SET WITH SPARK-SAFE CALL CIRCUIT,申请号PL19780208630-传众专利搜索

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发明名称	CENTRAL BATTERY TELEPHONE SET WITH SPARK-SAFE CALL CIRCUIT
摘要
申请公布号	PL109522(B2)	申请公布日期	1980.06.30
申请号	PL19780208630	申请日期	1978.07.24
申请人		发明人
分类号	H04M;H04M1/18;(IPC1-7):H04M1/18	主分类号	H04M
代理机构		代理人
主权项
地址

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