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发明名称
EXPONENTIALLY FORMED SOUND CONDUCTOR FOR ELECTRO-ACOUSTIC TRANSVERTERS AT TELEPHONE APPARATUS WHICH EMITS A TWO-FREQUENCY TONE CALL
摘要
申请公布号
YU216271(A)
申请公布日期
1978.05.15
申请号
YU19710002162
申请日期
1971.08.24
申请人
INSTITUT FUR NACHRICHTENTECHNIK
发明人
GUENTER ANDRES;DODRIMONG HORST;KASZYNSKI GERT;SCHOENHOFF JUERGEN;THIEL BERNHARD;KASZYNSKI GERT;JUERGEN SCHOENHOFF;SCHOENHOFF JUERGEN;BERNHARD THIEL;THIEL BERNHARD
分类号
H04M1/19;H04M1/02;(IPC1-7):H04R7/16
主分类号
H04M1/19
代理机构
代理人
主权项
地址
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