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发明名称
Einrichtung zur Erzeugung einer Doppelzackenschrift
摘要
申请公布号
DE765407(C)
申请公布日期
1953.05.04
申请号
DE1938E057359D
申请日期
1938.07.07
申请人
ELECTRICAL RESEARCH PRODUCTS INC.
发明人
KEITH CLYDE ROSWELL
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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