Method of making oval diaphragms,申请号US19480038033-传众专利搜索

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发明名称	Method of making oval diaphragms
摘要
申请公布号	US2540932(A)	申请公布日期	1951.02.06
申请号	US19480038033	申请日期	1948.07.10
申请人	CLARK JOHN T	发明人	CLARK JOHN T.
分类号	A61F6/08;B29D99/00	主分类号	A61F6/08
代理机构		代理人
主权项
地址

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