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发明名称
Duplex envelope
摘要
申请公布号
US2021795(A)
申请公布日期
1935.11.19
申请号
US19330693882
申请日期
1933.10.16
申请人
HARRY LEVINE
发明人
LEVINE HARRY
分类号
B65D27/08
主分类号
B65D27/08
代理机构
代理人
主权项
地址
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