Matériel éducatif du type stéréoscopique,申请号FRD821988-传众专利搜索

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发明名称	Matériel éducatif du type stéréoscopique
摘要
申请公布号	FR821988(A)	申请公布日期	1937.12.17
申请号	FRD821988	申请日期	1937.05.19
申请人		发明人	HILL VAN DYKE
分类号	G02B27/22	主分类号	G02B27/22
代理机构		代理人
主权项
地址

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