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发明名称
Composition board
摘要
申请公布号
US1906637(A)
申请公布日期
1933.05.02
申请号
US19300418356
申请日期
1930.01.03
申请人
SCHULKE LOUIS A
发明人
SCHULKE LOUIS A.
分类号
D21J1/16
主分类号
D21J1/16
代理机构
代理人
主权项
地址
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