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发明名称
Speed and footage indicator for motion picture machines
摘要
申请公布号
US1957172(A)
申请公布日期
1934.05.01
申请号
US19310519082
申请日期
1931.02.28
申请人
INTERNATIONAL PROJECTOR CORPORATION
发明人
KINDELMANN ALBERT;BOECKING EWALD
分类号
G03B21/43
主分类号
G03B21/43
代理机构
代理人
主权项
地址
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