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发明名称
Switch for ventilating systems
摘要
申请公布号
US2526315(A)
申请公布日期
1950.10.17
申请号
US19470772881
申请日期
1947.09.08
申请人
HERBERT ALLEN JOHN;RAMSEY ELWOOD S
发明人
ALLEN JOHN HERBERT;RAMSEY ELWOOD S.
分类号
E21F17/18
主分类号
E21F17/18
代理机构
代理人
主权项
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