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发明名称
Leveling means for a lap tray
摘要
申请公布号
US2877073(A)
申请公布日期
1959.03.10
申请号
US19560618542
申请日期
1956.10.26
申请人
MALMER ALBERT E
发明人
MALMER ALBERT E.
分类号
A47G23/06
主分类号
A47G23/06
代理机构
代理人
主权项
地址
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