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发明名称
Mécanisme acoustique parlant ou sonore, ses diverses applications et articles en résultant
摘要
申请公布号
FR990766(A)
申请公布日期
1951.09.26
申请号
FRD990766
申请日期
1949.05.07
申请人
发明人
CELESTIN WILLIAM-EDMOND
分类号
G04B21/00
主分类号
G04B21/00
代理机构
代理人
主权项
地址
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