Film holding attachment for cameras,申请号US19330690448-传众专利搜索

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发明名称	Film holding attachment for cameras
摘要
申请公布号	US1971435(A)	申请公布日期	1934.08.28
申请号	US19330690448	申请日期	1933.09.21
申请人	WEAR GEORGE R	发明人	WEAR GEORGE R.
分类号	G03B19/08	主分类号	G03B19/08
代理机构		代理人
主权项
地址

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