Cutting sections of piezo crystals,申请号US19280249778-传众专利搜索

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发明名称	Cutting sections of piezo crystals
摘要
申请公布号	US1764088(A)	申请公布日期	1930.06.17
申请号	US19280249778	申请日期	1928.01.26
申请人	THE CLEVELAND TRUST COMPANY	发明人	SAWYER CHARLES B.
分类号	B23D55/08;B28D5/04	主分类号	B23D55/08
代理机构		代理人
主权项
地址

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