Graduated semielliptic spring,申请号US19300437502-传众专利搜索

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发明名称	Graduated semielliptic spring
摘要
申请公布号	US1804300(A)	申请公布日期	1931.05.05
申请号	US19300437502	申请日期	1930.03.20
申请人	THE J. G. BRILL COMPANY	发明人	ADAMS WALTER S.
分类号	B61F5/12	主分类号	B61F5/12
代理机构		代理人
主权项
地址

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