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发明名称
Number keypad corral
摘要
A raised corral fence which surrounds a telephone number keypad using its sides with undercut openings and its corners to guide the fingers of the visually impaired to the desired number key.
申请公布号
US2004022386(A1)
申请公布日期
2004.02.05
申请号
US20020208224
申请日期
2002.07.30
申请人
CARL ROBERT ADAMS
发明人
ADAMS JOHN ELIAS
分类号
H04M1/23;H04M1/247;(IPC1-7):H04M1/00;H04M9/00
主分类号
H04M1/23
代理机构
代理人
主权项
地址
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