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发明名称
Safety seal
摘要
申请公布号
US1830950(A)
申请公布日期
1931.11.10
申请号
US19290383010
申请日期
1929.08.02
申请人
PREFERRED UTILITIES MANUFACTURING CORPORATION
发明人
LAKE HARRY E.
分类号
G01F15/00
主分类号
G01F15/00
代理机构
代理人
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地址
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