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经营范围
发明名称
Perfectionnements aux laryngophones
摘要
申请公布号
FR912631(A)
申请公布日期
1946.08.14
申请号
FRD912631
申请日期
1945.07.20
申请人
发明人
PULL JOSEPH-FRANCOIS-MICH
分类号
H04R1/14;H04R11/04
主分类号
H04R1/14
代理机构
代理人
主权项
地址
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