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发明名称
Lap boards
摘要
申请公布号
US3147949(A)
申请公布日期
1964.09.08
申请号
US19630297144
申请日期
1963.07.23
申请人
WEBSTER JAMES M
发明人
WEBSTER JAMES M.
分类号
A47B23/00
主分类号
A47B23/00
代理机构
代理人
主权项
地址
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