Perfectionnements aux bobines pour films cinématographiques,申请号FRD715916-传众专利搜索

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发明名称	Perfectionnements aux bobines pour films cinématographiques
摘要
申请公布号	FR715916(A)	申请公布日期	1931.12.11
申请号	FRD715916	申请日期	1931.04.23
申请人		发明人	BOIN FRANCOIS-ANTOINE;KEYSER RENE-ALEXIS
分类号	G03B21/32	主分类号	G03B21/32
代理机构		代理人
主权项
地址

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