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发明名称
Drafting machine
摘要
申请公布号
US2228140(A)
申请公布日期
1941.01.07
申请号
US19370181790
申请日期
1937.12.27
申请人
HENRY LITTLE CHARLES;HUBBARD LITTLE CHARLES
发明人
LITTLE CHARLES HENRY;LITTLE CHARLES HUBBARD
分类号
B43L13/06
主分类号
B43L13/06
代理机构
代理人
主权项
地址
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