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发明名称
Apparatus for cleaning blackboard erasers
摘要
申请公布号
US1830129(A)
申请公布日期
1931.11.03
申请号
US19290341133
申请日期
1929.02.19
申请人
DANIEL O'REILLY;JOSEPH HOWE
发明人
O'REILLY DANIEL;HOWE JOSEPH
分类号
B43L21/02
主分类号
B43L21/02
代理机构
代理人
主权项
地址
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