| Patents for B43L 13 - Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for (6,769) |
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| 04/03/1991 | CN2074246U Multi-functional drawing ruler |
| 04/03/1991 | CN2074242U Multi-purpose gauge |
| 04/03/1991 | CN2074241U Multi-functional drawing ruler |
| 03/20/1991 | CN2073368U Sleeve of set square |
| 03/20/1991 | CN2073249U Composition of pencil-case and rack-for reading with the use of pen container |
| 03/14/1991 | DE4013011C1 Tubular pen used as writing implement - has buffer chamber between front end of bore and rear end of tube which is checked for ink level by regulator |
| 03/13/1991 | CN2072917U List machine |
| 03/13/1991 | CN2072916U Combined digital plotting apparatus |
| 03/13/1991 | CN2072915U Protractor provided with sine/cosine circular functions |
| 03/13/1991 | CN2072782U Health-keeping stationery box |
| 03/06/1991 | CN2072483U Directional sliding set square |
| 03/06/1991 | CN2072358U Adjustable notebook folder |
| 02/27/1991 | CN2072256U Implement box for studying solid geometry |
| 02/27/1991 | CN2072027U Copying ruler for writing exercise |
| 02/27/1991 | CN2072026U Eight-purpose compasses for students |
| 02/27/1991 | CN2072025U Casing type combined stationery |
| 02/20/1991 | CN2071592U Chinese character stroke templet for children to exercise in calligraphy |
| 02/20/1991 | CN2071591U 握笔器 Wobi |
| 02/13/1991 | CN2071134U Fordable adjustable nearsight-proof writing board |
| 02/13/1991 | CN2071133U Portable light drawing machine |
| 02/12/1991 | US4992729 Low profile inker |
| 02/12/1991 | US4991300 Lead automatic supply device for X-Y plotter |
| 02/07/1991 | DE3924831A1 Arrangement for simultaneous draughting and digitising of designs - has digitising tablet on drawing surface with coordinate sensors and coordinate value selection device |
| 02/06/1991 | CN2070682U Archimedes spiral board |
| 02/06/1991 | CN2070681U 便携式多功能文具 Portable multifunction stationery |
| 01/30/1991 | CN2070251U Multi-purpose rule for maths |
| 01/30/1991 | CN1048821A Fully automatic blackboard for handwriting, picture drawing and sound and picture coopreation |
| 01/23/1991 | CN2069794U Drawing board |
| 01/23/1991 | CN2069793U Pen for enlarging picture |
| 01/23/1991 | CN2069792U Angle adjustable writing rack |
| 01/16/1991 | CN2069356U Multipurpose tracing template |
| 01/10/1991 | DE3920429A1 Digitalisiergeraet Digitizer |
| 01/09/1991 | EP0295267B1 Magnetically oriented draughting instrument |
| 01/09/1991 | CN2068918U Tracing instrument |
| 01/02/1991 | EP0405769A1 Unattended replacement of plotter pens |
| 01/02/1991 | EP0405768A1 Hydrophobic venting of free liquid ink reservoir pen |
| 01/01/1991 | US4982208 Method and apparatus for transferring writing tools in a graphics machine |
| 12/29/1990 | CA2011485A1 Hydrophobic venting of free liquid ink reservoir pen |
| 12/29/1990 | CA2009499A1 Unattended plotter pen replacement |
| 12/27/1990 | WO1990016044A1 Digitizer |
| 12/26/1990 | CN2068056U Passive self-rotating burin device |
| 12/25/1990 | US4979284 Apparatus for changing a sensing device |
| 12/20/1990 | DE3919879A1 Labelling device with symbol selection keyboard - has pen movable in two Cartesian coordinates on carriage guided reliably by simple mechanism |
| 12/18/1990 | US4979132 Control device for use with an image recording system |
| 12/18/1990 | US4978118 Paper sheet transporting method that applies an electrostatic attractive force between a paper sheet and a reinforcing insulating sheet prior to feeding |
| 12/11/1990 | US4976036 Assembly for detecting and recording surface contour data |
| 12/05/1990 | EP0400536A2 Measuring device for a coordinate of a figure |
| 12/05/1990 | CN2066812U Multi-funciton drawing device |
| 12/05/1990 | CN2066811U Traction device for hand writing exercise |
| 12/05/1990 | CN2066676U Multi-purpose stationery box with sight protective frame |
| 12/04/1990 | US4974326 Guide-pin |
| 11/28/1990 | EP0399052A1 Method of setting drawing parameters in an xy plotter |
| 11/28/1990 | CN2066609U Music mould plate |
| 11/27/1990 | US4972798 Drawing machine |
| 11/27/1990 | US4972598 Sign-makers template |
| 11/22/1990 | DE4010680A1 Display of instructions or notches - involves rectangular pieces of plastics film secured by overlapping adhesive sheets |
| 11/22/1990 | DE3915974A1 Straight edge for drawing board - is guided by grooves along board edges and held in required position by spring clamps |
| 11/21/1990 | CN2065989U Multi-purpose halving rule |
| 11/21/1990 | CN2065987U 万能曲线仪 Universal profiler |
| 11/21/1990 | CN2065984U Accuracy colour-distinguishing device for multi-colour pen |
| 11/21/1990 | CN2065839U Health pen box |
| 11/14/1990 | CN2065568U Arbitrary rolling set square |
| 11/14/1990 | CN2065567U Dual purpose mechanical part for large plate drawing digitization |
| 11/14/1990 | CN2065566U Protractor and set square, ruler made by using protractor |
| 11/14/1990 | CN2065565U Frame for writing character |
| 11/07/1990 | EP0396352A2 Electrostatic printer |
| 11/07/1990 | CN2065151U Parallel drawing instrument |
| 10/31/1990 | CN2064717U Supplementary device for pen absorbing water |
| 10/31/1990 | CN2064716U Multifunctional convenient ruler with reference system |
| 10/31/1990 | CN2064715U Geometric rule for zone time calculation |
| 10/31/1990 | CN2064594U Pencil box with preventing nearsightedness function |
| 10/30/1990 | US4966289 Series of peripheral apparatuses for rail type of drafting table |
| 10/24/1990 | EP0393320A1 Feeding system for capillary liquid applicators |
| 10/24/1990 | EP0393291A1 Writing system and method for producing visible markings on a medium |
| 10/24/1990 | CN2064309U Drawing board for studing physics of middle school |
| 10/24/1990 | CN2064308U Writing and reading apparatus with light measuring function |
| 10/18/1990 | WO1990012372A1 Computer output printer with plotter emulation |
| 10/17/1990 | CN2063888U Children writing apparatus |
| 10/17/1990 | CN2063887U Two-dimensional multifunction drafting rule |
| 10/17/1990 | CN2063886U Multifunction mapper for measuring and drawing |
| 10/16/1990 | US4964067 Computer output printer with plotter emulation |
| 10/10/1990 | CN2063484U Automatic warner for preventing myopia |
| 10/03/1990 | CN2063085U Alarm for bad posture of children |
| 10/03/1990 | CN2063084U Multipurpose gauge rule |
| 10/03/1990 | CN1009813B Dustless and wearless writing-board |
| 09/27/1990 | DE3904767A1 Scanning head |
| 09/26/1990 | CN2062686U Multifunctional universal rule |
| 09/19/1990 | CN2062286U Pen scriber |
| 09/19/1990 | CN1045367A Stereoplotter |
| 09/19/1990 | CN1045342A Reading and writing stand for student |
| 09/18/1990 | US4958299 Control device for use with a drawing output unit |
| 09/12/1990 | CN2061902U Multi-purpose stencil type toy gun |
| 09/11/1990 | CA1273785A1 Marking gauge for locating positions indicative of construction patterns of components of articles of furniture |
| 09/05/1990 | CN2061525U Portable drawing machine |
| 09/05/1990 | CN2061524U Parallel rule drawing machine with timing belt |
| 09/05/1990 | CN2061523U Multipurpose drawing instrument for geometry teaching |
| 09/05/1990 | CN2061522U Multipurpose line-drawing appliance |
| 09/05/1990 | CN2061521U Roll-preventing cap for round holder |
| 09/04/1990 | CA1273615A1 Plotter and aligning method |
| 08/29/1990 | EP0384590A2 Mechanical plotter pencil and methods of advancing lead therein |