Automatic travel guide,申请号US19280245786-传众专利搜索

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发明名称	Automatic travel guide
摘要
申请公布号	US1818228(A)	申请公布日期	1931.08.11
申请号	US19280245786	申请日期	1928.01.10
申请人	LUND NELSON C	发明人	LUND NELSON C.
分类号	G01C22/00	主分类号	G01C22/00
代理机构		代理人
主权项
地址

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