| Patents for B43L 13 - Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for (6,769) |
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| 11/25/1987 | CN87102909A One letter alphabet and the like |
| 11/19/1987 | EP0246006A2 Lap-oriented portable desk units |
| 11/10/1987 | US4705419 Mechanical pencil with automatic lead advance |
| 11/10/1987 | US4704797 Drawing device for use in a drafting machine and a drawing pencil used therewith |
| 11/07/1987 | CN86207612U Pencil heaad with a rubber and a brush |
| 11/07/1987 | CN86206704U Calligraphy exercise imitation board |
| 11/07/1987 | CN86204373U Marking pen |
| 11/07/1987 | CN86203498U Pantograph with reduced and enlarged scales |
| 11/05/1987 | DE3629936C1 Braking apparatus for carriage-type drawing machines |
| 11/05/1987 | DE3629700C1 Method of constructing perspective drawings with the aid of CAD programmes |
| 11/04/1987 | CN87202661U Multipurpose drawing rule |
| 11/04/1987 | CN87200103U Mechanical drawing title column template for students |
| 11/04/1987 | CN87200102U Translational motion type multifunctional drafting scale |
| 11/04/1987 | CN86208471U Section line template |
| 11/04/1987 | CN86206601U Multifunction drawing tool |
| 10/31/1987 | CN86210459U T-square |
| 10/31/1987 | CN86208913U Versatile dual-axis template |
| 10/28/1987 | EP0242739A2 One letter alphabet |
| 10/28/1987 | CN86108510A Arbitrary divider of an angle |
| 10/28/1987 | CN86100346A Arbitrary triangle multifunction ratio drawing calculating ruler |
| 10/21/1987 | CN87200601U Movable ruler |
| 10/20/1987 | US4700634 Lap-oriented portable desk units |
| 10/14/1987 | CN87200398U Myopia-proof device during writing for children |
| 10/14/1987 | CN86102153A Universal automatic ink grinder |
| 10/13/1987 | CA1228059A1 Plotter pen |
| 10/08/1987 | WO1987005863A1 Magnetically oriented draughting instrument |
| 10/07/1987 | CN86208889U Reading-distance hold device for students |
| 10/06/1987 | US4697348 Positioning systems |
| 10/03/1987 | CN86201313U Versatile teaching rule for rapid drawing |
| 09/30/1987 | CN86207064U Multidimensional rhombus ruler |
| 09/30/1987 | CN86205453U Intercept type dual-purpose compasses for drawing circle and ellipse |
| 09/23/1987 | CN86210847U Set square |
| 09/23/1987 | CN86101747A Method of writing silhouette character with imitation of natural jade texture |
| 09/17/1987 | DE3607971A1 Brake for drawing device |
| 09/16/1987 | CN86204169U Adjustable scale |
| 09/10/1987 | DE3638132C1 Additional weight for a carriage-type drawing machine |
| 09/09/1987 | CN86207991U Versatile convex ruler |
| 09/09/1987 | CN86205658U New drawing instrument with the functions of compasses, protractor and set square |
| 09/09/1987 | CN86203663U Versatile drawing pattern plate for optics, electric engineering and computer science |
| 09/01/1987 | US4690527 Device for reproduction and tracing |
| 09/01/1987 | US4690506 Method of producing varied line-space diffraction gratings |
| 08/26/1987 | CN86200922U Combination ruler |
| 08/25/1987 | US4689017 Drawings aid for making drawings in perspective |
| 08/25/1987 | US4688334 Apparatus for making perspective drawings |
| 08/25/1987 | US4688330 Guide for ellipse construction |
| 08/13/1987 | DE3602401A1 Method and apparatus for transferring predetermined profiles, symbols or the like onto drawing sheets |
| 08/12/1987 | CN86209885U Drawing square for isosceles polygon |
| 08/12/1987 | CN86202610U Multipurpose plotter |
| 08/12/1987 | CN86201475U Oil feeder for ball-pen |
| 07/30/1987 | WO1987004392A1 Foldable template for laying out stairway stringers and methods of using the same |
| 07/29/1987 | EP0229935A1 Automatic drawing and ruling machine |
| 07/29/1987 | CN86205949U Multi-purpose drawing ruler |
| 07/29/1987 | CN86203876U Combination stationery case |
| 07/29/1987 | CN85205342U Universal carpenter's ruler |
| 07/28/1987 | US4683476 Drawing machine having automatically replaced writing members and apparatus therefor |
| 07/28/1987 | US4682822 Electronic carriage brake for a drawing machine |
| 07/15/1987 | CN86209319U Multifunctional template ruler |
| 07/14/1987 | US4679328 Lettering template |
| 07/08/1987 | CN86204400U Three in one: compasses, ellipsograph and curve gauge |
| 07/01/1987 | CN86209084U Manual drawing machine |
| 07/01/1987 | CN86207599U Drawing angle square |
| 07/01/1987 | CN86207383U Plastic piece to keep hand from ink |
| 07/01/1987 | CN86207186U Pen-holding aid |
| 07/01/1987 | CN86202566U Adjustable template drawing grid square |
| 06/30/1987 | US4677572 Pen turret control system |
| 06/25/1987 | DE3544328A1 Liquid reservoir for writing or printing implements |
| 06/24/1987 | EP0226214A1 Cord mounted straight edge with hidden cords and engageable pulley blocks |
| 06/24/1987 | CN86203610U Multipurpose skid-free sleeve |
| 06/24/1987 | CN86200949U Efficient drawing scale |
| 06/16/1987 | US4673954 Multi-pen recording device |
| 06/16/1987 | US4672749 Mechanical perspective drafting device |
| 06/11/1987 | DE3606295C1 Double-forked joint |
| 06/10/1987 | CN86200917U Trisection protractor |
| 06/09/1987 | US4672190 Line following system and process with matrix generating |
| 06/09/1987 | US4670991 Drawing machine |
| 06/09/1987 | US4670990 Marking gauge for locating positions indicative of construction patterns of components of articles of furniture |
| 06/03/1987 | CN86204812U Multi-purpose drawing instrument |
| 05/27/1987 | EP0223679A2 Pen printer |
| 05/27/1987 | CN86204981U Universal ruler |
| 05/20/1987 | CN86202357U Versatile ruler |
| 05/19/1987 | US4665619 Method and apparatus for working on sheet material |
| 05/13/1987 | CN86204984U Holding corrector for writting brush |
| 05/13/1987 | CN86204874U Hatch line ruler |
| 05/13/1987 | CN86202872U Drawing template for mechanical drawing |
| 05/13/1987 | CN86201323U Universal t ruler |
| 04/29/1987 | CN85204818U Full circle scaled plate drawing instrument |
| 04/23/1987 | WO1987002315A1 Precision handprint coding device |
| 04/21/1987 | US4660055 Pen control circuit |
| 04/21/1987 | US4660054 Method of transferring writing instruments for a drawing machine |
| 04/15/1987 | CN86206237U Multi-functional plotter |
| 04/07/1987 | US4654976 Ruler belt hanger |
| 03/31/1987 | US4654675 Paper feeding device for automatic drafting machine |
| 03/31/1987 | US4653949 Writing or drafting instrument with cap actuator |
| 03/25/1987 | EP0215718A2 Mechanical device for determining the image distortion appearing in multicoloured impressions of pressed metal boxes and for plotting the corresponding correction curves |
| 03/25/1987 | CN86203589U Utensil for correcting manner of holding pen |
| 03/24/1987 | US4652337 Vehicle identification system |
| 03/19/1987 | DE3532409A1 Drawing device for reproducing perspective |
| 03/18/1987 | CN86105407A Pendulum apparatus |
| 03/11/1987 | EP0213621A1 Drawing device for use in a drafting machine and drawing pencil used therewith |
| 03/04/1987 | CN86204988U Translational multipurpose charting straightedge |