| Patents for B43L 13 - Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for (6,769) |
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| 08/25/1992 | US5141438 Art craft kit |
| 08/19/1992 | CN2113175U Rule |
| 08/19/1992 | CN2113174U Protector for vision |
| 08/19/1992 | CN2113173U Preventive myopia writting separating board for pupil |
| 08/19/1992 | CN2113172U Health device for reading and writting posture |
| 08/19/1992 | CN2112984U Protector for vision posture of student |
| 08/12/1992 | CN2112520U Universal rule for students |
| 08/12/1992 | CN2112519U Quick answering device |
| 08/12/1992 | CN2112518U Multi-purpose teaching aid |
| 08/12/1992 | CN2112513U Multifunction campasses |
| 08/12/1992 | CN2112313U Folding multi-purpose supporting frame for writing |
| 08/12/1992 | CN1063453A Multi-purpose drafting tool |
| 08/11/1992 | US5138561 Computer graphics plotter control |
| 08/11/1992 | US5138341 Plotter with drive rollers having variable radial contact surfaces |
| 08/05/1992 | CN2111860U Curve ruler for garments cutting-out |
| 08/05/1992 | CN2111859U Pen-holding position locator |
| 08/05/1992 | CN2111858U Pupil's visual distance indicator |
| 08/05/1992 | CN2111857U Myopia health writing device |
| 08/05/1992 | CN2111856U Obstruct-type pupil's myopia-proof device |
| 08/05/1992 | CN2111855U Coordinate rule with dot display |
| 08/04/1992 | US5134779 Plotter with flat-bed table and instrument carriage |
| 07/29/1992 | CN2111207U Multi-functional writing pattern plate |
| 07/29/1992 | CN2111206U Multi-functional set square |
| 07/29/1992 | CN2111205U Combined drawing ruler plate |
| 07/29/1992 | CN2111204U Multi-purpose ruler |
| 07/29/1992 | CN2111203U Multi-functional combined drafting unit |
| 07/29/1992 | CN1063077A Painting tool |
| 07/22/1992 | CN2110581U Eye protector |
| 07/22/1992 | CN2110580U Teaching multipurpose ruler |
| 07/15/1992 | CN2109953U Stationery tower |
| 07/15/1992 | CN2109951U Multifunction drawing instrument |
| 07/15/1992 | CN1062696A Protractor |
| 07/08/1992 | CN1062499A Five-purpose angle square for teachers |
| 07/01/1992 | CN2108632U Health studying folder for preventing myopia |
| 07/01/1992 | CN2108631U Portable multifunctional teaching aid |
| 06/24/1992 | CN2107999U Templet for writing drawing characters |
| 06/24/1992 | CN2107998U Templet for exercising stroke of drawing character tyle |
| 06/24/1992 | CN2107997U Double-deck rotary writing-brush-hanger |
| 06/24/1992 | CN2107832U Adjustable easel |
| 06/23/1992 | CA1304165C Writing system |
| 06/23/1992 | CA1303901C Low profile inker |
| 06/17/1992 | EP0343237B1 Apparatus for changing a sensing device |
| 06/17/1992 | CN2107388U Multi-purpose movable pen stand |
| 06/17/1992 | CN2107381U Core adjustable pencil with holding position limiter |
| 06/17/1992 | CN1061937A Myopia-preventing board for doing assignment |
| 06/16/1992 | US5121552 Design apparatus |
| 06/10/1992 | CN2106731U Universal drawing rule |
| 06/10/1992 | CN2106730U Health reading or writing table |
| 06/10/1992 | CN2106729U Multi-purpose drawing scale |
| 06/10/1992 | CN2106728U Multi-purpose set square |
| 06/10/1992 | CN2106727U Multi-functional drawing instrument |
| 06/09/1992 | US5121140 Writing pressure-changing device for recording device or the like |
| 06/03/1992 | CN2106085U Universal drawing templet for children |
| 06/03/1992 | CN2106084U Two-dimensional jaw drawing rule |
| 06/03/1992 | CN2106083U Set square capable of drawing ellipse and circle |
| 06/03/1992 | CN2106082U Combined drawing utensil |
| 06/03/1992 | CN2106081U Angle changeable drawing rule |
| 06/03/1992 | CN2106080U Multiple angle board for writing on blackboard |
| 06/03/1992 | CN1061565A Multifunction angle protractor |
| 06/02/1992 | CA1302379C Illuminated drafting aid |
| 05/27/1992 | CN2105401U Dry-proof device for writing tool |
| 05/26/1992 | US5117242 Method of winding paper onto a take-up roller of an automatic drafting machine |
| 05/26/1992 | US5117106 Scanning pattern drawing apparatus |
| 05/26/1992 | US5116153 Multiple line writing instrument |
| 05/26/1992 | US5115569 Coordinate reading and marking device |
| 05/20/1992 | CN2104766U Multifunctional field-like form drawing rule |
| 05/20/1992 | CN2104765U Practical five-angled rule |
| 05/20/1992 | CN2104764U Multipurpose intelligent rule implements |
| 05/19/1992 | US5115494 Method of drawing a cubic view |
| 05/19/1992 | CA1300969C Position transducer for use with a printer or plotter |
| 05/13/1992 | CN2104145U Multi-functional copy painting unit |
| 05/13/1992 | CN2104138U Changing rectangle apparatus |
| 05/13/1992 | CN2104135U Multi-functional ruler for blackboard drawing |
| 05/06/1992 | CN2103459U Copybook with characters cut in intaglio |
| 05/06/1992 | CN2103458U Multifunctional writing holder for preventing myopia |
| 05/06/1992 | CN2103457U Simple measurer for trigonometric functions |
| 05/06/1992 | CN2103455U Dual-purpose drawing board |
| 05/06/1992 | CN2103288U Multifunctional health book-rest capable of preventing myopia |
| 05/05/1992 | US5111532 Method of setting drawing parameters for an xy plotter |
| 05/05/1992 | US5110295 Educational tracing device |
| 04/29/1992 | EP0482299A1 Improved plotter pen assembly |
| 04/29/1992 | CN2103165U Space-time universal ruler |
| 04/29/1992 | CN2102854U Labour-saving plate for writing |
| 04/29/1992 | CN2102853U Multipurpose ruller |
| 04/28/1992 | US5109275 Printing signal correction and printer operation control apparatus utilizing neural network |
| 04/21/1992 | US5105551 Drafting |
| 04/17/1992 | WO1992006855A1 Surveyor's drafting aid |
| 04/17/1992 | CA2093656A1 Surveyor's drafting aid |
| 04/15/1992 | CN2101595U Writing pen for colour photograph |
| 04/15/1992 | CN2101593U Multipurpose combined ruler for student |
| 04/15/1992 | CN2101513U Intelligent magic pantograph |
| 04/08/1992 | CN2100990U Scribble board of computer reading test paper |
| 04/08/1992 | CN2100989U Multifunctional survey and drawing protractor |
| 04/08/1992 | CN1060066A Equated division metrical device |
| 04/07/1992 | US5102251 Supply system for devices that operate with the aid of capillary forces and are used to apply liquids |
| 04/07/1992 | US5101548 Apparatus for changing a sensing device |
| 04/01/1992 | CN2100317U Multi-purpose setting out appliance |
| 03/31/1992 | US5101473 Data printing system with printing position correction function |
| 03/31/1992 | US5101219 Long life pen and ink supply unit for x,y plotter and the like and related method of use |
| 03/31/1992 | US5100324 Pre-school stencil kit |