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发明名称
Grave markers
摘要
申请公布号
US2774162(A)
申请公布日期
1956.12.18
申请号
US19550481108
申请日期
1955.01.11
申请人
PORTER WILLIAM M
发明人
PORTER WILLIAM M.
分类号
E04H13/00
主分类号
E04H13/00
代理机构
代理人
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