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经营范围
发明名称
Improvements in or relating to semi-transparent reflectors
摘要
申请公布号
GB619360(A)
申请公布日期
1949.03.08
申请号
GB19460035915
申请日期
1946.01.31
申请人
FREDERICK ALAN DOWNES;THE SPERRY GYROSCOPE COMPANY, LIMITED
发明人
分类号
G02B27/10
主分类号
G02B27/10
代理机构
代理人
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地址
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