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经营范围
发明名称
Acoustic switch
摘要
申请公布号
US2015962(A)
申请公布日期
1935.10.01
申请号
US19310555810
申请日期
1931.08.07
申请人
JOHN E. STEWART
发明人
PRAETORIUS EDWARD;JOAQUIN NATHAN E.
分类号
H01H35/14
主分类号
H01H35/14
代理机构
代理人
主权项
地址
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