发明名称 Three-dimensional drawing device
摘要 A three-dimensional drawing device comprising a transparent hollow globe, a powder material disposed within the globe which adheres to the inner surface of the globe, a scribe disposed within the globe which can be used to draw upon the inner surface of the globe by scraping off the powder material, and controls for manipulating the scribe. The device can be used to form three-dimensional sketches and is primarily intended for use as a teaching aid and toy.
申请公布号 US5212874(A) 申请公布日期 1993.05.25
申请号 US19910668193 申请日期 1991.03.12
申请人 ANDERSON, RICHARD H.;ANDERSON, ROBERT R. 发明人 ANDERSON, RICHARD H.;ANDERSON, ROBERT R.
分类号 B43L1/12;G09B27/08 主分类号 B43L1/12
代理机构 代理人
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