| Patents for B43L 9 - Circular curve-drawing or like instruments (2,793) |
|---|
| 10/14/1987 | CN87200954U Multipurpose compasses with long arm |
| 10/14/1987 | CN87200623U Cone curve compasses |
| 10/14/1987 | CN87200124U Graduated compasses |
| 10/03/1987 | CN85204880U Compasses used on glass blackboard |
| 09/30/1987 | CN86205453U Intercept type dual-purpose compasses for drawing circle and ellipse |
| 09/03/1987 | DE3606717A1 Lead insert for compass and shaft extension for this purpose |
| 09/02/1987 | CN86202456U Multi-purpose educational compasses |
| 08/12/1987 | CN86207966U Beam compasses centring with suction cup |
| 07/29/1987 | CN86206939U Teaching compass with fixable center piece |
| 07/21/1987 | US4680864 Drawing guide |
| 07/14/1987 | US4679325 Chalk line marking device |
| 07/08/1987 | CN86204400U Three in one: compasses, ellipsograph and curve gauge |
| 06/17/1987 | CN85204839U Trisection divider for arbitrary plane angle |
| 06/09/1987 | US4670991 Drawing machine |
| 06/03/1987 | EP0224376A2 Drawing instrument |
| 05/27/1987 | CN86206656U Universal measureing and drawing tool |
| 05/27/1987 | CN86205223U Compasses for blackboard |
| 05/05/1987 | US4662076 Compass |
| 04/15/1987 | EP0217974A1 A rotating guide instrument for drawing circles |
| 04/15/1987 | CN86206237U Multi-functional plotter |
| 03/24/1987 | US4652164 Device to prevent the inadvertent coming-apart of the parts of a draftsman's ink writing instrument |
| 02/26/1987 | DE3628295A1 Parallel compass |
| 02/26/1987 | DE3529469A1 Drawing device |
| 02/11/1987 | CN86201861U Compass enable to divide circle into equant parts |
| 01/07/1987 | CN85205416U Multifunctional pen compass |
| 01/02/1987 | DE3606572C1 Fast-adjustment compass |
| 12/24/1986 | CN86204936U Three-point marker |
| 12/24/1986 | CN86204798U Multipurpose teaching compasses |
| 11/26/1986 | CN85201871U Multipurpose compasses |
| 11/25/1986 | US4624057 Method and template for circle layouts |
| 10/14/1986 | US4616418 Beam compass having changeable parts |
| 10/08/1986 | CN85205639U Pen with four functions |
| 08/28/1986 | WO1986004861A1 Ruler |
| 08/20/1986 | CN85201349U Three in one: fountain pen, compass and rule |
| 08/13/1986 | EP0190339A1 Drawing instrument |
| 08/13/1986 | CN85203370U Compasses with multiple chalk points |
| 07/15/1986 | US4599802 Draftsman's dimensional divider |
| 07/09/1986 | CN85201456U 万能绘图仪 Universal plotter |
| 06/04/1986 | EP0183629A1 Device for the articulated attachment of tracing instruments and points to the legs of a compass, and drawing compass fitted with this device |
| 02/27/1986 | WO1986001159A1 Drawing instrument |
| 01/22/1986 | CN85201540U Multipurpose compass capable of drawing ellipse |
| 01/01/1986 | CN85200177U Compass for equipartition of circumference |
| 12/31/1985 | US4561184 School utensil and toy robot |
| 12/27/1985 | EP0165362A1 Drawing compass |
| 10/22/1985 | US4547973 Trammel point attachment to steel tape rule |
| 09/24/1985 | US4542588 Beam compass |
| 09/24/1985 | US4542587 Drawing compass apparatus |
| 07/23/1985 | US4530156 Infinite radius circle drawing instrument |
| 05/14/1985 | CA1186891A1 Drawing instrument |
| 04/23/1985 | US4512081 Trammel head assembly |
| 04/03/1984 | US4439928 Drafting instrument |
| 12/13/1983 | CA1158430A1 Scribing compass for marking logs for notching and fitting |
| 10/04/1983 | US4407074 Apparatus for cutting and/or scribing circles and ovals |
| 11/16/1982 | US4358894 Compass pencil clamp |
| 10/12/1982 | US4353166 Toy-like instrument for drawing circles |
| 08/10/1982 | US4343094 Drafting apparatus |
| 06/01/1982 | CA1124510A1 Measuring and draughting instrument with telescopic extension |
| 05/04/1982 | US4327491 Holder for lead insert and needle for a compass |
| 03/10/1982 | EP0046830A1 Precision compass with articulated legs and rigid cross-bar |
| 03/09/1982 | US4318226 Scribing compass for marking logs for notching and fitting |
| 02/09/1982 | US4314408 Combination drafting instrument including rotatable scales, compass assembly and straight edge magnifier |
| 10/27/1981 | US4296554 Tape measure and marking device |
| 10/20/1981 | CA1111003A1 Drawing and painting instrument for graphic design |
| 06/24/1981 | EP0030712A1 Compass |
| 06/02/1981 | US4270273 Measuring instrument |
| 05/19/1981 | US4267638 Protected pivot adjustable scaled compasses |
| 12/30/1980 | US4241506 Skater's device |
| 12/10/1980 | EP0020291A1 Supporting element to be fixed on the extremity of a drawing compass's leg |
| 09/16/1980 | US4222171 Drafting instrument |
| 06/03/1980 | US4205450 Drafting instrument for perspective drawing and other uses |
| 01/01/1980 | CA1068897A Drawing instrument |
| 01/01/1980 | CA1068896A Drawing compass |
| 11/27/1979 | US4175330 Adjustable compass device |
| 11/27/1979 | CA1066884A1 Drawing instrument usable as compass or dividers |
| 11/13/1979 | US4173829 Drafting instrument |
| 11/06/1979 | US4173076 Scriber-compass with spring-loaded center punch |
| 10/23/1979 | US4171574 Drawing and painting instrument for graphic designs |
| 10/16/1979 | US4170824 Universal compass |
| 08/07/1979 | US4163322 Compass with fine adjustment |
| 05/29/1979 | US4156313 Compass housing |
| 04/24/1979 | US4150486 Drawing compass |
| 04/03/1979 | US4146965 Drawing instrument |
| 12/19/1978 | US4129948 Circle drawing and measuring device |
| 10/17/1978 | US4120092 Plastic injection molded bow compass |
| 08/15/1978 | US4106200 Marker compass |
| 08/08/1978 | US4104801 Drawing instrument |
| 08/01/1978 | US4103426 Apparatus for converting a measuring tape to a compass |
| 10/04/1977 | US4051599 Beam compass |
| 08/30/1977 | US4044464 Circular cutting device |
| 05/17/1977 | US4023277 Combined measuring tape and compass |
| 04/05/1977 | US4015337 Combined tape measure and marking device |
| 04/06/1976 | US3947969 Drawing instruments |
| 01/27/1976 | US3934343 Device for cutting circles |