| Patents for B43L 9 - Circular curve-drawing or like instruments (2,793) |
|---|
| 11/11/1992 | CN2121347U Multi-purpose compasses |
| 10/14/1992 | CN2118640U Multi-purpose automatic ends for compass |
| 10/13/1992 | US5154006 Tape measure clip for holding marker |
| 10/13/1992 | US5154004 Proportional divider |
| 08/27/1992 | DE4205072A1 Spring-bow drawing compasses - with legs covered with non-metallic material such as beech-wood |
| 08/26/1992 | EP0500228A1 Drawing compass |
| 08/26/1992 | CN2113897U Practical compass plug-in sleeve |
| 08/19/1992 | CN2113170U Compasses |
| 08/19/1992 | CN2113169U Curve gauge |
| 08/12/1992 | CN2112516U Synchronous three-leg compasses |
| 08/12/1992 | CN2112515U Stretchable compasses |
| 08/12/1992 | CN2112514U Multifunctional stretchable drawing device |
| 08/12/1992 | CN2112513U Multifunction campasses |
| 07/29/1992 | EP0368968B1 Cap for writing instruments |
| 07/29/1992 | CN2111204U Multi-purpose ruler |
| 07/15/1992 | CN2109951U Multifunction drawing instrument |
| 07/08/1992 | CN2109315U Multi-function compasses for teaching |
| 07/07/1992 | US5127164 Ice surface line applicator |
| 06/30/1992 | US5125161 Drafting instrument |
| 06/17/1992 | EP0394372B1 Measuring compass |
| 06/17/1992 | CN2107386U Proportional dividers |
| 06/11/1992 | DE4102218C1 Compasses for drawing circles - incorporates clamp mechanism with screw and friction surfaces |
| 06/10/1992 | CN2106731U Universal drawing rule |
| 06/03/1992 | CN2106079U Multipurpose compasses |
| 05/20/1992 | CN2104763U Compasses |
| 05/13/1992 | CN2104137U Automatic lead-output compass |
| 05/13/1992 | CN2104136U Straight axle ruler angle compass |
| 05/06/1992 | CN2103456U Multifunctional geometrical drawing compasses for teaching |
| 04/09/1992 | DE4030889A1 Geometrical compasses or dividers - has adaptor made of plastics for drawing lead or needle point |
| 03/25/1992 | CN2099680U Convenient compasses |
| 03/18/1992 | CN2099034U Plotting instrument for education |
| 03/11/1992 | CN2098388U Horizontally folding and dismountable compasses |
| 03/04/1992 | CN2097751U Automatic pencil compasses |
| 02/26/1992 | CN2097099U Combined multifunction compasses knife |
| 02/25/1992 | US5090127 Safety compass |
| 02/12/1992 | CN2095778U Full-function drawing tool |
| 02/12/1992 | CN2095777U Compasses capable of drawing ellipse |
| 01/29/1992 | CN2094458U Vertical adjusting compasses |
| 01/22/1992 | CN2093759U Continuous self-lead-coming out compasses |
| 01/22/1992 | CN2093758U Attracted disk compasses |
| 01/15/1992 | CN2093100U Adjustable big radius arc drawing instrument |
| 01/08/1992 | CN2092442U Pen-type compasses |
| 01/01/1992 | CN2091772U Compasses with scale |
| 12/04/1991 | CN2089876U 吸盘式教学圆规 Sucker teaching compasses |
| 11/28/1991 | DE4014927A1 Leg of pair of compasses - has toothed segment at upper end with recesses which are close fit over end of leg |
| 10/17/1991 | WO1991015372A1 Compass with its drawing means maintained automatically perpendicular |
| 10/16/1991 | CN2086668U Tangent compass |
| 10/08/1991 | US5054949 Cap for writing implement with air vent |
| 10/02/1991 | CN2085740U Plate type compasses |
| 09/25/1991 | CN2085306U 多功能圆规 Multifunction Compass |
| 09/24/1991 | US5050309 Rolling ruler having a retractable and rotatable pivot pin |
| 08/07/1991 | CN2082239U Multi-function plotting instrument |
| 08/07/1991 | CN2082238U Drawing apparatus |
| 08/01/1991 | DE4002115A1 Pair of compasses - have pin mountings hinging into recesses in arms from working position |
| 07/25/1991 | DE4001936A1 Pair of compasses with writing implement holder(s) - has rotary axes of holders in bearing bores of compasses leg |
| 07/24/1991 | CN2081348U Teaching aid compasses fulcrum antiskid unit |
| 07/23/1991 | US5033197 Dry wall/panel applicator's tool |
| 07/09/1991 | CA1285755C Pair of measuring compasses |
| 06/27/1991 | DE3942523A1 Head for pair of compasses - has gripper made as integral plastics moulding, and has bottom clamp retainers |
| 06/26/1991 | EP0433521A1 Drafting instrument |
| 06/26/1991 | CN2079567U Folding compasses with writing clip |
| 06/04/1991 | US5020227 Elongated graduated beam member |
| 05/22/1991 | CN2077378U Multipurpose teaching compasses |
| 05/08/1991 | CN2076496U Compasses for blackboard teaching |
| 05/08/1991 | CN2076495U Combined pointer and compasses for teacher |
| 05/02/1991 | DE4032094A1 Beam compAsses with longitudinal guide slot - has movable leg attached to sliding nut actuated by screwed spindle |
| 04/17/1991 | EP0422062A1 Compass |
| 04/16/1991 | US5007320 Compass |
| 04/10/1991 | CN2074713U Full compasses |
| 03/20/1991 | CN2073367U Compass for teaching and studying |
| 03/12/1991 | CA1281180C Geometric instrument and method of making same |
| 02/27/1991 | CN2072026U Eight-purpose compasses for students |
| 02/06/1991 | CN2070679U Multifunctional gauge |
| 12/12/1990 | CN2067224U Multi-function pen type divider |
| 12/11/1990 | US4976037 Marking and cutting device |
| 12/05/1990 | CN2066810U Ellipse compasses |
| 11/28/1990 | CN2066390U Multipurpose drawing compasses |
| 11/14/1990 | CN2065564U Multifunctional curve drawing instrument |
| 11/14/1990 | CN2065563U Compass for circular curve or ellipse |
| 11/07/1990 | EP0395971A1 Bow compass |
| 10/31/1990 | EP0394372A1 Measuring compass. |
| 10/30/1990 | US4965941 Combination marker and tape measure |
| 10/17/1990 | CN2063886U Multifunction mapper for measuring and drawing |
| 10/10/1990 | EP0391027A2 Compass, particularly for draughtsmen |
| 09/26/1990 | EP0388611A2 Fastening and adjusting device, particularly for draughtsman compasses |
| 09/19/1990 | CN1045367A Stereoplotter |
| 09/12/1990 | CN2061901U No positioning centre compass |
| 09/05/1990 | CN1009485B A pair of measuring compasses |
| 08/22/1990 | CN2060731U Multi-function compass |
| 08/15/1990 | CN2060399U Halver gauge |
| 08/15/1990 | CN2060398U Strain stress compasses |
| 07/18/1990 | CN2059400U Improved double-purpose compasses |
| 07/04/1990 | EP0375822A1 Transformable writing instrument |
| 06/13/1990 | CN2058143U Multi-function suction-disk compasses |
| 06/13/1990 | CN1042870A Three-legged two-purpose ellipsograph |
| 05/23/1990 | EP0368968A1 Cap for writing instruments. |
| 05/23/1990 | CN2057391U Multifunctional combined compasses for teaching |
| 05/23/1990 | CN1042330A Conical section gauge |
| 04/25/1990 | CN2056390U New type drawing compass head protective unit |
| 04/18/1990 | CN2056127U Drawing instrument |