| Patents for B43L 13 - Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for (6,769) |
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| 08/29/1990 | CN2061127U Multifunctional drawing rule |
| 08/28/1990 | US4951397 Parking scale |
| 08/22/1990 | CN2060734U Multi-purpose drawing aids |
| 08/22/1990 | CN2060733U Multi-function drawing aids |
| 08/22/1990 | CN2060732U Chinese writing brush marking gauge |
| 08/22/1990 | CN2060730U Multi-purpose writing appliance with pens |
| 08/21/1990 | US4949466 Drawing device having indexable stylus turret |
| 08/15/1990 | CN2060403U Form instrument |
| 08/15/1990 | CN2060402U Myopia-proof indicator for pencil/pen |
| 08/15/1990 | CN2060401U Multipurpose scribing clip |
| 08/15/1990 | CN2060400U 绘图板 Drawing board |
| 08/08/1990 | CN2060121U Practical drawing unit |
| 08/08/1990 | CN1044432A Sizing gauge |
| 08/01/1990 | CN1009033B Writing medium control system |
| 07/25/1990 | WO1990008938A1 Instrument for measuring angles and plotting with direct angle display and/or corresponding trigonometric values |
| 07/25/1990 | CA2025891A1 Angle measuring device and marquing out instrument with direct display of angle and/or corresponding trigonometric data |
| 07/24/1990 | US4943817 Adaptor for universal X-Y plotter pen |
| 07/18/1990 | EP0378350A2 Paper sheet transporting method |
| 07/18/1990 | CN2059401U Rotory whole-circle protractor |
| 07/17/1990 | US4941267 Electronic measuring device and method for obtaining an actual measurement between points shown on a scaled drawing |
| 07/04/1990 | EP0375760A1 Plotter with flatbed and tool carriage. |
| 07/04/1990 | CN2058885U Light drafting machine with parallel motion ruler |
| 07/04/1990 | CN2058884U Composite compass protractor set square |
| 07/03/1990 | US4937949 Basketball court layout device |
| 06/27/1990 | CN2058634U Multi-purpose stationery case |
| 06/26/1990 | US4937594 Recording pen |
| 06/26/1990 | US4936020 Layout template for picture framing mat |
| 06/21/1990 | DE3941318A1 Direct writing on e.g. thick-film integrated circuit - involves compensation of distance data obtd. from laser beam reflections at predetermined points on circuit substrate |
| 06/19/1990 | US4934061 Draughting tables, drawing boards, drawing instruments and analogous apparatus |
| 06/14/1990 | WO1990006551A1 Method of setting construction parameters in an xy plotter |
| 06/13/1990 | CN2058143U Multi-function suction-disk compasses |
| 06/12/1990 | US4932332 Electronics oriented desk |
| 05/30/1990 | CN2057620U Multi-purpose drafting gauge |
| 05/30/1990 | CN2057619U Combined stationery |
| 05/30/1990 | CN2057618U Reading and writing posture correcting unit |
| 05/30/1990 | CN2057561U Reading and writing distance-controlable stationery box |
| 05/29/1990 | US4928399 Marking template |
| 05/23/1990 | CN2057391U Multifunctional combined compasses for teaching |
| 05/16/1990 | CN2057144U Myopia-proof pen |
| 05/09/1990 | CN2056902U Multipurpose combined stationery |
| 05/02/1990 | EP0365740A1 Line recorder |
| 05/02/1990 | CN2056639U Combined drawing device |
| 04/25/1990 | EP0364776A2 Drawing device |
| 04/24/1990 | US4920357 Unattended replacement of plotter pens |
| 04/24/1990 | US4918822 Perspective drafting apparatus |
| 04/18/1990 | CN2056127U Drawing instrument |
| 04/17/1990 | US4916826 Stencil for handprinting equally spaced, accurately aligned characters |
| 04/17/1990 | US4916819 For producing graphics |
| 04/10/1990 | US4916466 Plotter having a support platen of angular profile |
| 04/10/1990 | US4915319 Progressive plotter with brake for supply roll |
| 04/10/1990 | US4914824 Parallel rule |
| 04/05/1990 | WO1990003278A1 Drawing instrument |
| 04/04/1990 | CN2055449U Drawing instrument for multiple-direction perspective drawing |
| 04/04/1990 | CN2055448U Intelligence training chest for children |
| 04/04/1990 | CN1040954A Model wc-1 multifunctional drawing ruler |
| 03/28/1990 | CN2055097U Pen rack for precision drawing instrument |
| 03/28/1990 | CN2055096U Multi-function drawing ruler |
| 03/27/1990 | US4910872 Hand-operated copying machine |
| 03/21/1990 | CN2054753U Projection tracing case |
| 03/15/1990 | DE3830524A1 Device for drawing the profile of a three-dimensional object |
| 03/14/1990 | CN2054407U Multi-functional curve ruler |
| 03/14/1990 | CN2054406U Multi-trace marking box |
| 03/14/1990 | CN2054404U Multipurpose teaching compasses |
| 03/14/1990 | CN2054403U Drafting angle ruler |
| 03/07/1990 | CN2053990U Drawing board for teaching physics in the middle school |
| 03/07/1990 | CN2053989U Multifunction simple drawing instrument |
| 03/07/1990 | CN2053988U F shaped changeable ruler and its mating drawing-board |
| 03/06/1990 | US4905830 Packing case also usable for clothes-hanging and drawing purposes |
| 03/06/1990 | US4905610 Rotable drafting table having rectangular configured drafting surface |
| 02/28/1990 | CN2053579U Plotting ruler |
| 02/28/1990 | CN2053578U Multi-function teaching plotting apparatus |
| 02/28/1990 | CN2053577U High-speed drafting machine |
| 02/21/1990 | CN2053154U Multipurpose geometric pattern plate |
| 02/21/1990 | CN2053153U 磁吸笔架 Magnetic penholder |
| 02/21/1990 | CN2053152U Multifunctional plotter |
| 02/21/1990 | CN2053150U Multipurpose teaching rule |
| 02/21/1990 | CN2053148U Photo-controlled pen for preventing myopia |
| 02/21/1990 | CN1039761A Dual-face writting and calculating plastics card box (abbreviation:"card box") |
| 02/20/1990 | US4903045 X-Y plotter for non-perforated paper |
| 02/13/1990 | US4899454 Perspective drawing machine |
| 02/13/1990 | US4899449 Drafting instrument |
| 02/07/1990 | CN2052360U Ink injecting device |
| 02/07/1990 | CN2052357U Dictation device |
| 02/07/1990 | CN2052356U Multipurpose rule |
| 01/31/1990 | CN2051897U Multi-purpose straight-line drawing appliance |
| 01/30/1990 | US4897800 Electronic graph drawing apparatus |
| 01/30/1990 | CA1265108A1 Pen printer |
| 01/24/1990 | CN1038975A Sitting-posture keeper for protecting eyesight |
| 01/17/1990 | CN2051165U Utensil for primary school pupil to study geometry |
| 01/17/1990 | CN2051164U Eye sight protected board with red characters for pupil to trace over with brush |
| 01/17/1990 | CN2051163U Dry-proof apparatus of ink for drawing pen |
| 01/17/1990 | CN1038792A Multifunctional ellipsograph |
| 01/10/1990 | CN2050802U New drawing implement |
| 01/03/1990 | EP0348655A2 A marking tool drive system for a draughting or similar type of machine |
| 01/03/1990 | CN2050387U Multifunction set square |
| 01/03/1990 | CN2050386U Drawing rule with toy boards |
| 01/03/1990 | CN2050385U Pencil-holding device |
| 01/03/1990 | CN2050382U Automatic upright pen support |
| 01/02/1990 | USH720 Simplified lettering system |
| 12/26/1989 | US4889442 Writing instrument with ink quantity of level detecting function |