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发明名称
BRIEFUMSCHLAG MIT EINER ZU VERSENDENDEN EINLAGE AN DER EIN ZUM OEFFNEN DES BRIEFUMSCHLAGES BESTIMMTER FADEN BEFESTIGT IST.
摘要
申请公布号
DE1757431(U)
申请公布日期
1957.12.05
申请号
DE195500D0791U
申请日期
1955.07.26
申请人
KARL DELASBE
发明人
KARL DELASBE
分类号
主分类号
代理机构
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