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摘要
申请公布号
US2519821(A)
申请公布日期
1950.08.22
申请号
US19460682272
申请日期
1946.07.09
申请人
R. F. SIMMONS COMPANY
发明人
JR. LESTER DOUGLAS BURR,
分类号
A44B5/00
主分类号
A44B5/00
代理机构
代理人
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