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发明名称
Interlocked crossed helical springs
摘要
申请公布号
US1788867(A)
申请公布日期
1931.01.13
申请号
US19270171059
申请日期
1927.02.25
申请人
ROME COMPANY, INC.
发明人
HANAUER DARWIN
分类号
A47C23/055
主分类号
A47C23/055
代理机构
代理人
主权项
地址
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