| Patents for B43L 13 - Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for (6,769) |
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| 01/18/1989 | CN2030948U 绘图工具 Drawing Tools |
| 01/18/1989 | CN1030382A Dustless and wearless writing-board |
| 01/11/1989 | CN2030555U Drafting parallel meter |
| 01/11/1989 | CN2030554U Multi-purpose curve plotter |
| 01/11/1989 | CN2030553U Multi-functional pencil cap |
| 01/11/1989 | CN2030552U 书写姿势限制器 Writing posture limiter |
| 01/11/1989 | CN2030551U Multi-purpose angle rule |
| 01/11/1989 | CN2030550U Pen rack for drawing |
| 01/04/1989 | CN2030152U Tracing device of chinese characters |
| 01/04/1989 | CN2030151U Vision distance corrector for writing |
| 01/04/1989 | CN1030033A Chinese ink |
| 12/28/1988 | CN88211416U Basic programme block-diagram template |
| 12/27/1988 | US4794542 Sign generating apparatus with input of second sign information while cutting a first sign |
| 12/27/1988 | US4794406 Pen lifting and lowering positioner for graphic recorder |
| 12/27/1988 | US4794403 Writing system |
| 12/21/1988 | CN88203227U Formboard for exercising to write words |
| 12/21/1988 | CN88202960U Symbol and gragh formboard for posessing information |
| 12/20/1988 | US4791733 Used for drawing different geometric figures |
| 12/14/1988 | CN88211171U Apparatus for deeping pupil's posture right |
| 12/14/1988 | CN88204154U Convenient geometrical drawing draughting board |
| 12/13/1988 | US4790077 Ruler for fixed-distance movement |
| 12/07/1988 | EP0293628A1 Drawing head |
| 12/07/1988 | EP0293481A1 Method of transferring data to a plotter |
| 12/07/1988 | CN87209283U Multipurpose teaching setting-out ruler |
| 12/01/1988 | DE3715500A1 Set square |
| 11/30/1988 | CN88204217U Pencil-holding corrector |
| 11/30/1988 | CN88201102U Guide way type mapper |
| 11/30/1988 | CN88200050U Dirt-proof ink-sucking device for pen-holder |
| 11/30/1988 | CN87216544U Multifunctional draughting mould board |
| 11/24/1988 | DE3811861A1 Polygon drawing template |
| 11/23/1988 | EP0292418A1 Jigs for the learning of proportion in artistic drawings |
| 11/23/1988 | CN88204546U Ink drawer |
| 11/22/1988 | US4785546 Lithographic production planning system |
| 11/09/1988 | CN88201777U Drawing device of microcomputer numerical controlled machine tool |
| 11/02/1988 | EP0289381A2 Writing head for a drawing machine |
| 11/02/1988 | EP0288887A2 Plotter |
| 11/02/1988 | CN88203769U Drafting template for statistics |
| 11/02/1988 | CN88200956U Double-purpose daub-protecting drawing pattern board |
| 11/02/1988 | CN87207633U Universal triangle template |
| 11/01/1988 | US4781230 Template for use in carving a three-dimensional object |
| 10/26/1988 | CN87215145U Univesal plotting instrument |
| 10/25/1988 | US4779543 Rotatable drafting table having rectangular configured drafting surface |
| 10/19/1988 | CN88202143U Model ruler for mathematics, physics and chemistry |
| 10/19/1988 | CN87102330A 画图器 Paint is |
| 10/18/1988 | US4779104 Pen plotter pen type identification system |
| 10/12/1988 | CN87216226U Planar angle-dividing mechanism |
| 10/12/1988 | CN87210137U 制图仪 Mapper |
| 10/12/1988 | CN87205462U Multi-purpose protractor |
| 10/12/1988 | CN87101527A Vernier type multipurpose drawing instrument |
| 10/05/1988 | CN87204427U Multipurpose drawing instrument |
| 09/28/1988 | CN87216963U Universal stereoscopic triangle square |
| 09/21/1988 | EP0283339A1 Graphic machine with a device for receiving a continuous printing support |
| 09/21/1988 | EP0283111A2 Moving node wave isolator for drafting plotters |
| 09/21/1988 | CN88210715U Multifunctional survey and drawing instrument |
| 09/21/1988 | CN87212801U Multipurpose ruler |
| 09/21/1988 | CN87207567U Form-location tolerance pattern plate |
| 09/20/1988 | US4771543 Patent-drafting aid |
| 09/14/1988 | CN87210069U Writing brush practising writing ring for children |
| 09/13/1988 | US4769914 Lettering device |
| 09/07/1988 | CN88210068U Multi-purpose compasses/protractor |
| 09/07/1988 | CN87207122U L-precise drawing rule |
| 08/31/1988 | CN87204126U Penmanship appliance case |
| 08/30/1988 | CA1241217A1 Method and apparatus for a computer-controlled, semiautomatic evaluation of aerial stereo images |
| 08/24/1988 | CN88201333U Corrector for children reading and writing posture |
| 08/24/1988 | CN87211441U Combined article for studying mathematics and physics |
| 08/17/1988 | CN87212363U Multi-functional drawing rule |
| 08/17/1988 | CN87201694U Multi-purpose differentiating rule |
| 08/16/1988 | US4764880 Compound plotting apparatus and related method of operation |
| 08/16/1988 | CA1240498A1 Trammel head assembly |
| 08/10/1988 | CN87215722U Multi-purpose correcting appliance for correcting pupil's reading and writing posture |
| 08/09/1988 | US4763116 Input apparatus for design work on an image-bearing screen |
| 08/03/1988 | CN88210016U Fluorescent lighted drawing box |
| 08/02/1988 | US4761657 Method for feeding a drawing medium such as paper in a drawing plotter |
| 07/27/1988 | EP0276027A2 Apparatus for cutting sheet material |
| 07/27/1988 | EP0276026A2 Automated sign generator |
| 07/26/1988 | US4760412 Apparatus and method for exposing lines on a photosensitive surface |
| 07/20/1988 | CN87215296U Pocket adjustable foldable neaisightness-preventing unit used in writing |
| 07/20/1988 | CN87212167U Multi-function compasses |
| 07/20/1988 | CN87211163U Drawing machine with h-type three-guide-rail |
| 07/20/1988 | CN87201771U Set square with angle scale |
| 07/20/1988 | CN87107598A Joinable solid state chinese ink |
| 07/13/1988 | CN87213820U Universal french curve |
| 07/13/1988 | CN87213510U Drawing instrument for architectural perspective views |
| 07/12/1988 | US4757330 Pen pressure device |
| 07/12/1988 | US4756557 Security document having a security thread embedded therein and methods for producing and testing the authenticity of the security document |
| 07/12/1988 | US4756086 Pen printer |
| 07/07/1988 | DE3644391A1 Labelling device |
| 06/30/1988 | DE3643413A1 Structogram template for structured programming |
| 06/29/1988 | CN87215646U Multi-purpose ruler |
| 06/29/1988 | CN87214786U Multi-functional mapper |
| 06/29/1988 | CN87203648U Color head portrait elastic writting apparatus (holding pen apparatus) |
| 06/29/1988 | CN87200846U Ten thousand times writting pattern plate |
| 06/28/1988 | US4754288 Pen carousel, pen sensing and indexing |
| 06/28/1988 | CA1238619A1 Writing device for drawing machine |
| 06/22/1988 | CN87215104U Easy quick drawing instrument for worksite |
| 06/22/1988 | CN87212742U Card for drawing circle |
| 06/22/1988 | CN87211702U Chalk ruling instrument |
| 06/15/1988 | CN87213884U Character aid device |
| 06/15/1988 | CN87212089U Geometric drawing rule for pupils |
| 06/15/1988 | CN87211530U Bridge type drawing rule |