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发明名称
Zone filter
摘要
申请公布号
US1938085(A)
申请公布日期
1933.12.05
申请号
US19310553266
申请日期
1931.07.27
申请人
ASHCRAFT PAGE NANON
发明人
PAGE NANON ASHCRAFT
分类号
G02C7/16
主分类号
G02C7/16
代理机构
代理人
主权项
地址
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