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发明名称
KEYBOARD APPARATUS
摘要
申请公布号
CA784078(A)
申请公布日期
1968.04.30
申请号
CAD784078
申请日期
申请人
CREED AND COMPANY LIMITED
发明人
FREDERICK P. MASON
分类号
主分类号
代理机构
代理人
主权项
地址
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