| Patents for B43L 11 - Non-circular-curve-drawing instruments (856) |
|---|
| 12/17/1997 | CN2270635Y Curve drawing instrument for drawing conic section |
| 12/03/1997 | CN2269318Y Four-purpose campasses for drawing |
| 11/26/1997 | CN2268636Y Ellipse drawing gauge |
| 11/19/1997 | CN2267951Y Ellipsograph |
| 11/19/1997 | CN2267950Y Stereo drawing pen |
| 11/05/1997 | CN2266518Y Conical section gauge |
| 10/29/1997 | CN2265910Y Base curve combined cone curve gauge |
| 10/22/1997 | CN2265302Y Ellipse compasses |
| 10/15/1997 | CN2264675Y Combined conical section divider calipers |
| 09/10/1997 | CN2261941Y Linked elliptic compasses |
| 09/10/1997 | CN2261940Y 浆糊笔 Paste pen |
| 08/20/1997 | CN2260008Y Multi-function ruler for drafting |
| 08/13/1997 | CN2259296Y Conical section gage |
| 08/06/1997 | CN2258824Y Simple ellipse drawing implement |
| 08/06/1997 | CN2258823Y Ellipse calliper |
| 08/06/1997 | CN2258822Y Multifunctional sinusoid drawing instrument |
| 06/11/1997 | CN2255926Y 椭圆规 Oval Regulation |
| 06/04/1997 | CN2255366Y Shower nozzle for glue bottle |
| 06/04/1997 | CN2255365Y Dual compasses capable of being as both compasses and ellipsograph |
| 04/23/1997 | CN2252717Y Student ellipsograph |
| 03/26/1997 | CN2250264Y Two-purpose campasses for circle and ellipse |
| 03/26/1997 | CN1145858A Cross-section gauge for conoid |
| 03/26/1997 | CN1145857A Cross-section gauge for cylinder |
| 03/12/1997 | CN1144747A Compasses cabable of drawing big and small ellipses |
| 03/05/1997 | CN2248694Y Glue bottle |
| 02/05/1997 | CN1141854A 椭圆规 Oval regulation |
| 01/22/1997 | CN2245539Y Belt corrector with changable belt box |
| 01/15/1997 | CN2245000Y Curve gauge |
| 01/08/1997 | CN2244488Y Multipurpose compass-ellipsograph |
| 10/23/1996 | CN2238151Y Ellipsograph |
| 10/16/1996 | CN2237553Y Ellipsograph |
| 09/17/1996 | US5555631 Ellipse Scribe |
| 09/04/1996 | CN2234360Y Hyperbolograph |
| 08/20/1996 | US5546664 Compass able to draw any-size ellipses |
| 07/24/1996 | CN2231618Y Simple curve gauge |
| 06/18/1996 | US5526573 Device for circumscribing circles and ellipses |
| 05/08/1996 | CN2226633Y Window made of plastic or aluminium alloy |
| 05/08/1996 | CN2226632Y Thermal insulation type door and window |
| 05/08/1996 | CN2226631Y Non-inside frame sliding folding window |
| 04/03/1996 | CN2223695Y Instrument for drawing parabola |
| 04/03/1996 | CN2223694Y Circular curve-drawing instrument |
| 03/13/1996 | CN2222071Y Ellipse compasses |
| 02/28/1996 | CN2220947Y 椭圆规 Oval Regulation |
| 02/28/1996 | CN2220946Y 椭圆规 Oval Regulation |
| 02/07/1996 | EP0695650A1 A gear socket structure for a designing rule |
| 02/07/1996 | CN2219214Y Universal vertical ellipsograph |
| 01/24/1996 | CN2218087Y Two-way ellipse and circle drawing instrument |
| 01/24/1996 | CN2218086Y 椭圆规 Oval Regulation |
| 01/03/1996 | CN2216469Y 椭圆规 Oval Regulation |
| 12/20/1995 | CN2215413Y Conical section drawing instrument |
| 11/15/1995 | CN2212508Y Ellipsograph |
| 10/25/1995 | CN2210796Y 椭圆规 Oval regulation |
| 10/04/1995 | CN1109416A Correct elliptic parabola gauge |
| 08/16/1995 | CN2205315Y Elliptic compasses |
| 08/09/1995 | CN2204725Y Drawing instrument for involute and archimedes spiral |
| 07/19/1995 | CN2203659Y 一种椭圆规 An Elliptical regulation |
| 07/11/1995 | US5430946 Device for circumscribing circles and ellipses |
| 06/28/1995 | CN1104153A Multi-functional gauge |
| 05/31/1995 | CN2199063Y 椭圆规 Oval regulation |
| 05/24/1995 | CN2198125Y Conic curve drawing instrument |
| 05/17/1995 | CN2197228Y Curve gauge |
| 05/03/1995 | CN2196031Y Ellipse compasses |
| 04/26/1995 | CN1101878A 椭圆规 Oval regulation |
| 03/08/1995 | CN2191103Y Conical section drawing instrument |
| 02/08/1995 | CN2189062Y Scaled flexible ruler type instrument for drawing ellipses |
| 01/18/1995 | CN2187552Y Multi-purpose drawing compasses |
| 01/04/1995 | CN2186668Y Ellipse gauge |
| 12/08/1994 | DE4318911A1 Device for drawing ellipses |
| 11/30/1994 | CN2183898Y Ellipse compasses |
| 11/09/1994 | CN2182075Y Two purpose gauge for drawing circle and ellipse |
| 10/26/1994 | CN2180482Y Ellipse compasses |
| 10/25/1994 | US5357681 Gear socket structure for a designing rule |
| 10/12/1994 | CN2179273Y Elliptical gauge |
| 09/07/1994 | CN2176259Y Compass for ellipse |
| 08/24/1994 | CN2175116Y Ellipse compass |
| 08/24/1994 | CN2175115Y Ellipse compass |
| 07/20/1994 | CN2172212Y Conical curve compasses |
| 07/20/1994 | CN1025485C 椭圆规结构 Regulation oval structure |
| 06/15/1994 | CN2168729Y Ellipse gauge |
| 06/08/1994 | CN2167857Y A pair of compasses for drawing ellipse |
| 06/01/1994 | CN2166974Y Ellipses compass |
| 06/01/1994 | CN2166973Y Ellipses compass |
| 06/01/1994 | CN2166972Y Ellipses compass |
| 06/01/1994 | CN2166971Y Compass for teachers for drawing ellipses and double-curve |
| 06/01/1994 | CN2166970Y Two-purpose compass for drawing ellipses and circular |
| 05/18/1994 | CN2165005Y Instrument for drawing ellipses and circle |
| 04/06/1994 | CN2160549Y Multifunctional ellipsograph |
| 03/23/1994 | CN2159309Y Ellipse compass |
| 03/02/1994 | CN2157873Y Multi-purpose ellipsograph |
| 02/09/1994 | CN2155311Y Multi-purpose curve gauge |
| 12/15/1993 | CN2149295Y Ellipses instrument |
| 12/01/1993 | CN2147970Y All-purpose ellipse drawing instrument |
| 11/24/1993 | CN2147121Y Precision ellipse gauge |
| 11/17/1993 | CN2146375Y French curve |
| 11/10/1993 | CN2145709Y Combined conical curve compasses |
| 10/06/1993 | CN1076893A 椭圆规 Oval regulation |
| 09/15/1993 | CN2142192Y Profilo meter |
| 09/15/1993 | CN1076159A Suspended and rotatable ellipsograph with bevel gear |
| 09/01/1993 | CN2141360Y Adsorption type multi-purpose compasses |
| 08/25/1993 | CN2140834Y Instrument for drawing ellipses |