| Patents for B43L 13 - Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for (6,769) |
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| 06/15/1988 | CN87208198U Multifunction drawing machine |
| 06/15/1988 | CN87204944U Drawing instrument |
| 06/09/1988 | DE3711862A1 Printing device |
| 06/08/1988 | CN87212418U Multi-functional arc instrument |
| 06/08/1988 | CN87206887U Multi-functional drawing board with magnetic treatment function |
| 06/01/1988 | EP0269287A2 Treating workpieces |
| 06/01/1988 | DE3737528A1 Apparatus for counterbalancing drawing rulers in a drawing machine |
| 06/01/1988 | CN87214466U Multipurpose teaching ruler |
| 06/01/1988 | CN87202257U Drafting instrument |
| 06/01/1988 | CN87201090U Multifunction drafting ruler |
| 05/25/1988 | EP0268402A2 Printing a desired pattern on a workpiece surface |
| 05/24/1988 | CA1237108A1 Pen recorder |
| 05/19/1988 | WO1988003680A1 Method of transferring data to a plotter |
| 05/19/1988 | DE3639477A1 Multipurpose straightedge (ruler) |
| 05/19/1988 | DE3637875A1 Writing instrument with writing refill for writing media in liquid or paste form which can be accommodated therein and replaced |
| 05/18/1988 | CN87214348U Parabolic curve |
| 05/18/1988 | CN87208396U Servicing structure for drawing parallel lines |
| 05/11/1988 | CN87207566U Component templet with rough surface |
| 05/11/1988 | CN87205985U Drawing ruler with wheels |
| 05/11/1988 | CN87202821U Drawing board for middle school mathematics |
| 05/04/1988 | EP0266191A2 Plotter and aligning method |
| 05/04/1988 | CN87211714U Pen used for gilding |
| 05/04/1988 | CN87205175U Multipurpose drawing instrument for teaching |
| 05/04/1988 | CN87105284A Perpetual blind calendars |
| 04/27/1988 | EP0264549A2 Perpetual blind calendars |
| 04/27/1988 | CN87208944U Pattern plate for the answering multiple-choice test |
| 04/26/1988 | US4739558 Line drawing instrument |
| 04/20/1988 | CN86208812U Quality control chart board |
| 04/19/1988 | US4738029 Numerically or manually controlled moving carriage drafting machine |
| 04/13/1988 | CN87206817U Combination drawing rule of multiple functions |
| 04/13/1988 | CN87203895U Drawing-ruler |
| 04/13/1988 | CN86209720U Universal curve-drawing instrument |
| 04/12/1988 | US4736526 Geometry template |
| 04/06/1988 | EP0262319A2 Device and process for paper feed in a plotter and cutting apparatus |
| 04/06/1988 | CN87202137U Length-adjustable and any angle-drawing ruler |
| 04/05/1988 | US4735663 Method and apparatus for bonding a printing plate to a flexible endless printing belt |
| 04/05/1988 | US4734993 Straightedge |
| 04/05/1988 | US4734987 Moving node wave isolator for drafting plotters |
| 03/31/1988 | DE3721149C1 Pantograph |
| 03/30/1988 | CN87209575U Multipurpose drawing instrument equipped with gravity angle indicator and compass |
| 03/30/1988 | CN87208835U Dotted line-drawing square |
| 03/30/1988 | CN87208335U Stand for writing |
| 03/30/1988 | CN87203356U Light and convenient drawing machine |
| 03/30/1988 | CN87202255U 多边形绘图尺 Polygon drawing ruler |
| 03/30/1988 | CN86106312A Device for using altering liquids |
| 03/29/1988 | US4734716 Plotter and aligning method |
| 03/29/1988 | US4733473 Duplicating drawing apparatus |
| 03/23/1988 | CN87209016U Multi-purpose cooperating plate ruler |
| 03/23/1988 | CN87208302U Angle divider combined ruler with compass |
| 03/16/1988 | CN87207773U Pattern plate ruler |
| 03/16/1988 | CN87204834U 多用绘图板 Multi-purpose drawing board |
| 03/16/1988 | CN87104357A Platform for the drawing instruments and stationery |
| 03/16/1988 | CN86105949A Versatile curve instrument |
| 03/09/1988 | CN86207176U Programmable drawing appliance |
| 03/02/1988 | CN87207980U Ruler and protractor with arbitrary angle |
| 03/02/1988 | CN87206987U Seating posture appliance for students to write |
| 03/02/1988 | CN87203572U Multi-functional photo plate for writting |
| 03/02/1988 | CN87203370U Sine equant gauge |
| 03/02/1988 | CN86105473A Handwriting correcting device |
| 03/01/1988 | US4728964 Recording apparatus with an indicator for indicating current recording conditions |
| 03/01/1988 | CA1233447A1 Perpetual blind calendar (pbc) |
| 02/25/1988 | DE3714757C1 Holder for a drawing pen |
| 02/24/1988 | CN85205594U Compass pantograph |
| 02/18/1988 | DE3637081C1 Template for drawing elongate holes |
| 02/18/1988 | DE3627230A1 Aid to learning freehand drawing |
| 02/17/1988 | CN87210197U Intelligence exercise board for children |
| 02/10/1988 | CN86208107U Speeded-up means for practising with words |
| 02/10/1988 | CN85203795U Multi-purpose pen-type portable compass |
| 02/03/1988 | CN87201002U Curve template |
| 01/27/1988 | EP0253805A1 Foldable template for laying out stairway stringers and methods of using the same |
| 01/27/1988 | CN87204835U Engineering drawing pattern plate |
| 01/27/1988 | CN86104541A Model for calligraphy practising |
| 01/26/1988 | US4721058 Paper cutting unit of automatic drawing machines |
| 01/20/1988 | CN87208343U Plane angle equally dividing instrument |
| 01/20/1988 | CN87202366U Multifunctional adjustable curve |
| 01/20/1988 | CN87200166U Rotatable and height adjustable pen pot holder |
| 01/14/1988 | DE3615674C1 Curved ruler |
| 01/13/1988 | CN87202476U Rolling type document writing apparatus |
| 01/07/1988 | EP0250800A2 Sign generating apparatus |
| 01/06/1988 | CN87202667U Student-used multipurpose folding drafting scale |
| 01/06/1988 | CN87202607U Vision distance controlled studying board for students |
| 01/06/1988 | CN87200329U Automatic eject chalk box with pen container |
| 01/05/1988 | US4718000 Numerically controlled writing instrument |
| 01/05/1988 | US4717109 Adjustable traveling mahl and magnetic support for mounting artist's canvases |
| 12/31/1987 | CN87202145U Writing posture corrector |
| 12/29/1987 | US4716420 Pen turret rotation for plotters |
| 12/23/1987 | CN87100578A Electromagnetic writing plate |
| 12/23/1987 | CN86206173U Plotting tool capable of spreading coordinate quickly |
| 12/15/1987 | US4712937 Plotter stylus with cap covered vent |
| 12/12/1987 | CN86208233U Short-sighted protector |
| 12/12/1987 | CN86206468U "mould plate building block" plotting instrument |
| 12/09/1987 | CN86103592A Scorpion model angle protractor |
| 12/05/1987 | CN86210448U Multi-purpose folding drawing rule |
| 12/05/1987 | CN86207050U Non-skid, easy-operating plastics t-square |
| 12/02/1987 | EP0247943A1 Drawing machine |
| 12/02/1987 | CN87204194U 万能角板 Universal gussets |
| 12/02/1987 | CN87200869U Multipurpose set square |
| 12/01/1987 | CA1229727A1 Device for centerless circle construction |
| 11/25/1987 | CN87201157U Multifunction drawing implement for measure and calculation |
| 11/25/1987 | CN87200096U Multifunction folding ruler |