发明名称 PROTRACTOR OR RULER WITH A LIGHT SOURCE
摘要 <p>A measuring instrument comprising a frame and a plurality of measurement indicia. A power source is positioned inside a portion of the frame with a light source operatively connected to the power source. When a user presses down upon the frame, the light source is actuated, sending light throughout the frame and illuminating the measurement indicia, providing improved visibility for a user.</p>
申请公布号 WO2004018961(A1) 申请公布日期 2004.03.04
申请号 WO2003US25914 申请日期 2003.08.20
申请人 ALTERRA HOLDINGS CORPORATION 发明人 CARLSON, CHRISTOPHER, ROBERT;CORNELL, ROBERT, WILLIAM;WOLF, JASON;IMHOFF, KEVIN, LEIGH
分类号 G01B3/56;G01B3/04;G01D11/28;(IPC1-7):G01B3/04;B43L7/00 主分类号 G01B3/56
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