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经营范围
发明名称
Self-cleaning butterfly gate
摘要
申请公布号
US2662545(A)
申请公布日期
1953.12.15
申请号
US19510238427
申请日期
1951.07.25
申请人
THE J. B. EHRSAM & SONS MFG. CO.
发明人
KELLEY HUGH
分类号
F16K1/22
主分类号
F16K1/22
代理机构
代理人
主权项
地址
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