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发明名称
Tractive indicator for automatic aperture controllers
摘要
申请公布号
US2894439(A)
申请公布日期
1959.07.14
申请号
US19540413324
申请日期
1954.03.01
申请人
MICHAEL BURGER;ERICH BURGER
发明人
BURGER MICHAEL;BURGER ERICH
分类号
G03B7/12
主分类号
G03B7/12
代理机构
代理人
主权项
地址
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