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发明名称
Improvements in or relating to hotel register indicators for displaying variable information
摘要
申请公布号
GB403202(A)
申请公布日期
1933.12.21
申请号
GB19320027895
申请日期
1932.10.07
申请人
EDWIN STANLEY HARRIS
发明人
分类号
主分类号
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主权项
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