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发明名称
Typewriter line spacer
摘要
申请公布号
US1856612(A)
申请公布日期
1932.05.03
申请号
US19300468620
申请日期
1930.07.17
申请人
ZERICK HOWARD E
发明人
ZERICK HOWARD E.
分类号
B41J19/76
主分类号
B41J19/76
代理机构
代理人
主权项
地址
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