Drafting machine counterbalance,申请号US19410398706-传众专利搜索

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发明名称	Drafting machine counterbalance
摘要
申请公布号	US2330970(A)	申请公布日期	1943.10.05
申请号	US19410398706	申请日期	1941.06.19
申请人	HARRIMAN JOHN W	发明人	HARRIMAN JOHN W.
分类号	B43L13/06	主分类号	B43L13/06
代理机构		代理人
主权项
地址

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