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经营范围
发明名称
Artificial larynx
摘要
申请公布号
US1993076(A)
申请公布日期
1935.03.05
申请号
US19310567570
申请日期
1931.10.08
申请人
THE CHEMICAL FOUNDATION INCORPORATED
发明人
SCHEARD CHARLES;PORTER ADRIEN N.
分类号
A61F2/20
主分类号
A61F2/20
代理机构
代理人
主权项
地址
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