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发明名称
ANGLE TRISECTOR
摘要
Transparent plastic T-square, dual blade, and protractor devices for performing geometrical and trigonometrical measurements with particular emphasis on trisecting angles and dividing angles into a plurality of equal segments.
申请公布号
US3693261(A)
申请公布日期
1972.09.26
申请号
USD3693261
申请日期
1970.06.02
申请人
WILLIAM M. MOORE
发明人
WILLIAM M. MOORE
分类号
B43L7/12;(IPC1-7):B43L9/08
主分类号
B43L7/12
代理机构
代理人
主权项
地址
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