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经营范围
发明名称
Improvements in drawing instruments
摘要
申请公布号
GB565908(A)
申请公布日期
1944.12.04
申请号
GB19430010324
申请日期
1943.06.25
申请人
HERBERT FAWCETT;JOHN STEWART;METROPOLITAN-VICKERS ELECTRICAL COMPANY LIMITED
发明人
分类号
B43L13/20
主分类号
B43L13/20
代理机构
代理人
主权项
地址
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