Piano keyboard level adjusting bar,申请号US05/844052-传众专利搜索

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发明名称	Piano keyboard level adjusting bar
摘要
申请公布号	USD255904(S1)	申请公布日期	1980.07.15
申请号	US05/844052	申请日期	1977.10.20
申请人		发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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