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发明名称
Peephole for doors
摘要
申请公布号
US2491758(A)
申请公布日期
1949.12.20
申请号
US19470774470
申请日期
1947.09.17
申请人
ABE NICHOLS;JOSEPH SPECTOR
发明人
NICHOLS ABE;SPECTOR JOSEPH
分类号
E06B7/30
主分类号
E06B7/30
代理机构
代理人
主权项
地址
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