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发明名称
Projecting device
摘要
申请公布号
US1879600(A)
申请公布日期
1932.09.27
申请号
US19290412674
申请日期
1929.12.09
申请人
ART METAL WORKS, INC.
发明人
BURCHETT WALTER J.
分类号
G03B21/32;G09F19/18
主分类号
G03B21/32
代理机构
代理人
主权项
地址
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