Control means for door closers,申请号US19280253917-传众专利搜索

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发明名称	Control means for door closers
摘要
申请公布号	US1833121(A)	申请公布日期	1931.11.24
申请号	US19280253917	申请日期	1928.02.13
申请人	NORTON-LASIER COMPANY	发明人	NORTON LEWIS C.
分类号	E05F3/12	主分类号	E05F3/12
代理机构		代理人
主权项
地址

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