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发明名称
Ear protector
摘要
申请公布号
US2812517(A)
申请公布日期
1957.11.12
申请号
US19550489545
申请日期
1955.02.21
申请人
BOGART FRANCES E;GLADYS GRAMS
发明人
BOGART FRANCES E.;GRAMS GLADYS
分类号
A61F11/06
主分类号
A61F11/06
代理机构
代理人
主权项
地址
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