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发明名称
Signals for mailboxes
摘要
申请公布号
US3026024(A)
申请公布日期
1962.03.20
申请号
US19600064600
申请日期
1960.10.24
申请人
HOLMGREN FRANK A;HOLMGREN FREDA I
发明人
HOLMGREN FRANK A.;HOLMGREN FREDA I.
分类号
A47G29/122
主分类号
A47G29/122
代理机构
代理人
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地址
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