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发明名称
Optical photometer especially for photographic appliances
摘要
申请公布号
US1915033(A)
申请公布日期
1933.06.20
申请号
US19310581747
申请日期
1931.12.17
申请人
WILHELM SCHLICHTER
发明人
SCHLICHTER WILHELM
分类号
G01J1/40
主分类号
G01J1/40
代理机构
代理人
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地址
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