| Patents for B43L 11 - Non-circular-curve-drawing instruments (856) | |
|---|---|
| 05/2011 | |
| 05/04/2011 | CN102042377A Device for converting circular motion into noncircular closed line motion |
| 04/2011 | |
| 04/28/2011 | WO2011047678A1 A drawing device for creating mandala |
| 04/27/2011 | CN102034383A Parabola graphic instrument |
| 04/27/2011 | CN102034382A Hyperbolic graphic instrument |
| 04/27/2011 | CN102034381A Elliptic graphic instrument |
| 04/20/2011 | CN201800393U Rectangular protractor for students |
| 04/13/2011 | CN201792649U Elliptical drawing tool |
| 04/13/2011 | CN201792648U Parabola drawing tool |
| 04/13/2011 | CN101612853B Ellipsograph |
| 04/06/2011 | CN201784344U Sine function drawing rule |
| 04/06/2011 | CN102001251A Stepless involute gauge |
| 03/2011 | |
| 03/30/2011 | CN201777045U Sine-wave drawing ruler |
| 01/2011 | |
| 01/26/2011 | CN201721210U Looped ellipse formwork |
| 01/19/2011 | CN101618643B Stepless involute planning |
| 01/12/2011 | CN201705879U Device for converting circular movement into noncircular closed line movement, chronometer and tool |
| 12/2010 | |
| 12/01/2010 | CN201659805U Orbicular compasses |
| 11/2010 | |
| 11/25/2010 | WO2010133711A1 System for drawing ellipses |
| 11/24/2010 | CN201646145U Simple and multifunctional ellipsograph |
| 11/24/2010 | CN201646144U Ellipsograph with flexible rule |
| 11/24/2010 | CN201646143U Plotting instrument |
| 11/17/2010 | CN201633392U Curve-drawing instrument |
| 11/10/2010 | CN201626212U Multi-purpose geometric drawing instrument |
| 09/2010 | |
| 09/08/2010 | CN201573436U Double-pen drawing ellipsograph used in primary mathematics teaching |
| 09/08/2010 | CN201573435U Elliptical ruler |
| 07/2010 | |
| 07/28/2010 | CN201534435U 圆椭规 Round oval regulation |
| 07/21/2010 | CN201530224U Multifunctional student ruler |
| 06/2010 | |
| 06/30/2010 | CN101758709A Elliptical plotter |
| 06/30/2010 | CN101758708A Device for drawing ellipses |
| 06/23/2010 | CN201511708U Universal gauge |
| 06/23/2010 | CN101746190A Dual-purpose compasses |
| 05/2010 | |
| 05/19/2010 | CN201471971U Triangular rule with ellipse drawing device |
| 05/13/2010 | US20100115777 Drawing apparatus utilizing measuring tape |
| 05/12/2010 | CN201456781U Novel ellipsometer |
| 05/12/2010 | CN201456780U Oval measuring and drawing instrument |
| 05/12/2010 | CN201456764U Multifunctional teaching ruler |
| 03/2010 | |
| 03/24/2010 | CN201427472Y Simple ellipsograph used for teaching |
| 03/10/2010 | CN201419591Y ellipsograph |
| 03/10/2010 | CN201419589Y Multi-functional teaching ruler |
| 03/03/2010 | CN201415568Y Multifunctional ruler for teaching |
| 02/2010 | |
| 02/17/2010 | CN201405634Y Ellipsograph |
| 02/11/2010 | US20100031519 Microscope slide marking apparatus and method |
| 01/2010 | |
| 01/20/2010 | CN201385516Y Ellipse drawing device |
| 01/06/2010 | CN101618643A Stepless involute planning |
| 12/2009 | |
| 12/30/2009 | CN101612853A Ellipsograph |
| 12/23/2009 | CN201366885Y Simple ellipsograph |
| 12/16/2009 | CN201362105Y Multifunctional diagraph for students |
| 12/16/2009 | CN101602308A Ellipsograph |
| 12/09/2009 | CN201357665Y Simple ellipsometer |
| 12/02/2009 | CN201353957Y Analytic geometry surveying instrument |
| 11/2009 | |
| 11/11/2009 | CN201342879Y Elliptical bow compass plate |
| 09/2009 | |
| 09/30/2009 | CN101544149A Multifunctional drawing tool |
| 09/23/2009 | CN101537757A Multifunctional teaching ruler |
| 09/02/2009 | CN101519014A Ellipse drawing plate |
| 09/02/2009 | CN100534810C Adjusting forward and backward direction screw gauge |
| 08/2009 | |
| 08/19/2009 | CN101508219A Bridge type ellipsograph |
| 06/2009 | |
| 06/18/2009 | US20090151175 Adjustable Rotary Structure |
| 06/17/2009 | CN201257853Y Electric Archimedes spiral drawing instrument |
| 06/16/2009 | US7546686 Drawing apparatus |
| 06/11/2009 | WO2009071969A1 Drawing apparatus |
| 06/04/2009 | US20090139099 Drawing apparatus |
| 05/2009 | |
| 05/27/2009 | CN201245011Y Magnetic elliptic compasses |
| 05/20/2009 | CN201240178Y Ellipsograph |
| 05/13/2009 | CN201235685Y Two-purpose elliptic, elliptical compass compasses |
| 04/2009 | |
| 04/22/2009 | CN201224272Y Ellipsograph |
| 04/22/2009 | CN101412339A Ellipsograph |
| 04/15/2009 | CN201220548Y Secondary curves instrument |
| 03/2009 | |
| 03/12/2009 | US20090064512 Eyeglass lens measurement apparatus |
| 03/04/2009 | CN201201445Y Brush pencil sliding sleeve for ellipsograph |
| 03/04/2009 | CN201201444Y Simple elliptic compasses |
| 02/2009 | |
| 02/26/2009 | US20090049701 Method for designing structure by drawing curve approximately with circular segment, and structure thereby |
| 02/18/2009 | CN201195453Y Portable elliptical compass |
| 02/04/2009 | CN201189786Y Hyperbolic curve gauge |
| 02/04/2009 | CN201189785Y Novel omnipotent compasses and rule |
| 01/2009 | |
| 01/21/2009 | CN201183412Y Parabola drawing board |
| 01/21/2009 | CN201183259Y Logarithm spiral gauge |
| 12/2008 | |
| 12/24/2008 | CN201169165Y Multipurpose elliptic compasses |
| 12/24/2008 | CN201169164Y Conical section unified mapping gauge |
| 12/10/2008 | CN201161508Y Demonstration instrument for taper curve |
| 12/09/2008 | US7461459 Instrument for drawing ellipse or the like |
| 11/2008 | |
| 11/26/2008 | CN201154624Y Divider calipers for drawing approximate spiral line |
| 11/12/2008 | CN201148075Y Compasses capable of drawing ellipse |
| 10/2008 | |
| 10/29/2008 | CN201140626Y Compasses for drawing ellipses |
| 10/29/2008 | CN101293454A Novel para-curve gauge |
| 10/29/2008 | CN101293452A Three-foot dual-purpose gauge |
| 10/08/2008 | CN201128326Y Multipurpose rule gauge with sucker |
| 10/01/2008 | CN201124686Y Multipurpose square ruler |
| 10/01/2008 | CN201124682Y Drawing instrument for non-arc curve |
| 09/2008 | |
| 09/03/2008 | CN201109307Y Simple teaching calipers capable of drawing ellipse |
| 08/2008 | |
| 08/27/2008 | CN201105587Y Ellipsograph |
| 08/27/2008 | CN201105586Y Ellipsograph |
| 08/20/2008 | CN100411885C Large scale profilogram fixing plate |
| 07/2008 | |
| 07/23/2008 | CN201089307Y Ellipsograph device |
| 07/17/2008 | US20080168668 Instrument for drawing ellipse or the like |
| 07/16/2008 | CN201086551Y Ellipse drawing ruler |
| 07/16/2008 | CN201086548Y Multi-functional compass for teaching use |
| 06/2008 | |
| 06/11/2008 | CN201070938Y Rapid air-dry correcting pen |
| 06/11/2008 | CN201070931Y Multifunctional ruler |
| 06/04/2008 | CN201068039Y Coiling property |
| 03/2008 | |
| 03/19/2008 | CN201036954Y Curve-drawing instrument for drawing conic section |
| 01/2008 | |
| 01/23/2008 | CN201009596Y Simple elliptical instrument |