Window frame and sash construction,申请号US19310550723-传众专利搜索

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发明名称	Window frame and sash construction
摘要
申请公布号	US1991840(A)	申请公布日期	1935.02.19
申请号	US19310550723	申请日期	1931.07.14
申请人	BURNS ROBERT M	发明人	BURNS ROBERT M.
分类号	E06B3/50	主分类号	E06B3/50
代理机构		代理人
主权项
地址

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