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发明名称
IMPROVEMENTS IN OR RELATING TO ELECTROMAGNETIC DISPLAY DEVICES
摘要
申请公布号
GB1273527(A)
申请公布日期
1972.05.10
申请号
GB19680022187
申请日期
1968.05.10
申请人
SMITHS INDUSTRIES LIMITED
发明人
RONALD FREDERICK BLANDFORD;DAVID WILLIAM HOSKINS
分类号
G08B5/22;H02K33/12
主分类号
G08B5/22
代理机构
代理人
主权项
地址
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