Double-acting gravity hinge,申请号US19520281619-传众专利搜索

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发明名称	Double-acting gravity hinge
摘要
申请公布号	US2661495(A)	申请公布日期	1953.12.08
申请号	US19520281619	申请日期	1952.04.10
申请人	AMERICAN GRAVITY DOOR CLOSER, INC.	发明人	KALLEBERG KORNELIUS
分类号	E05F1/06	主分类号	E05F1/06
代理机构		代理人
主权项
地址

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