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发明名称
Sign and indicator
摘要
申请公布号
US1946385(A)
申请公布日期
1934.02.06
申请号
US19330674754
申请日期
1933.06.07
申请人
BRYANT NATHAN B
发明人
BRYANT NATHAN B.
分类号
G09F15/00
主分类号
G09F15/00
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