Telescopic bifocal lens,申请号US19350030448-传众专利搜索

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发明名称	Telescopic bifocal lens
摘要
申请公布号	US2025893(A)	申请公布日期	1935.12.31
申请号	US19350030448	申请日期	1935.07.09
申请人	THE UNIVIS LENS COMPANY	发明人	POLACKOFF EDWARD
分类号	G02C7/06;G02C7/08	主分类号	G02C7/06
代理机构		代理人
主权项
地址

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