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发明名称
Memorandum pad
摘要
申请公布号
US1931140(A)
申请公布日期
1933.10.17
申请号
US19320593510
申请日期
1932.02.17
申请人
BOHMERT WILLIAM C
发明人
BOHMERT WILLIAM C.
分类号
B41L1/24;B42F3/00
主分类号
B41L1/24
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