| Patents for G09B 11 - Teaching hand-writing, shorthand, drawing, or painting (2,187) |
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| 05/23/1989 | US4832604 Writing aid |
| 05/23/1989 | CA1254382A1 Teaching apparatus |
| 05/16/1989 | US4830690 Method for making an art work from colored adhesives |
| 05/09/1989 | US4828497 Graphic art skill development puzzle kit |
| 05/03/1989 | CN2036903U Multifunction divider calipers |
| 04/26/1989 | CN2036686U Learn-to-draw device for children |
| 04/18/1989 | US4822284 Educational appliance for teaching handwriting skills |
| 04/12/1989 | CN2035713U Compass for blackboard drawing |
| 04/05/1989 | CN2035320U Portable blackboard |
| 03/22/1989 | CN2034529U Multifunctional drawing instrument for teaching |
| 03/22/1989 | CN2034526U Caterpillar revolving blackboard |
| 03/15/1989 | CN2034131U High-speed practising calligraphy board |
| 03/08/1989 | CN2033752U Automatic circle drewing appliance |
| 03/01/1989 | CN2033528U Chinese character matrix plate |
| 03/01/1989 | CN2033344U Large-scale push-type machine blackboard |
| 03/01/1989 | CN1031349A Dust-absorbing blackboard |
| 02/15/1989 | CN2032551U Rotary dust-free blackboard |
| 02/08/1989 | CN2032147U Simple ellipse compasses |
| 02/01/1989 | CN2031752U Impression for child painting picture |
| 02/01/1989 | CN1030839A Optical viewfinder for painting from nature |
| 01/18/1989 | CN2030950U Baby drawing board |
| 01/18/1989 | CN2030947U Up and down movable blackboard |
| 01/17/1989 | US4798537 Movable grid drawing frame |
| 01/04/1989 | CN2030152U Tracing device of chinese characters |
| 01/04/1989 | CN2030149U Electric soft blackboard |
| 12/27/1988 | US4793810 Interactive instructional apparatus and method |
| 12/21/1988 | CN88203227U Formboard for exercising to write words |
| 12/21/1988 | CN88201190U 可动式黑板 Movable blackboard |
| 12/07/1988 | CN87209283U Multipurpose teaching setting-out ruler |
| 12/01/1988 | WO1988009112A1 Specified program of world immaterialism a-1, called ''reiryu-shinki (sacred dragon-sacred treasure)'', for divination art method of organic energy astrology transcended from concept of material civilization |
| 11/16/1988 | CN87209703U Auto-wiping blackboard |
| 11/09/1988 | CN88212437U Folding type multi-purpose teaching compasses |
| 11/02/1988 | CN87213568U Radian compasses |
| 10/05/1988 | CN87204778U Magnetic blackboard |
| 09/28/1988 | CN87209032U Multi-purpose combined plate for painting and teaching |
| 09/21/1988 | CN87216594U Bookshelf for clipping books |
| 09/20/1988 | CA1242167A1 Writing aid and method of teaching using the writing aid |
| 08/03/1988 | CN87216024U Teaching assistance for writing on blackboard |
| 07/20/1988 | CN87216170U Writing board for teaching |
| 07/20/1988 | CN87201771U Set square with angle scale |
| 07/13/1988 | CN87215717U Roll-up type self-cleaning dustless blackboard |
| 07/13/1988 | CN87207680U Card toy for small painters |
| 06/29/1988 | CN87214264U Anti-daubing scale edge shape |
| 06/29/1988 | CN87204323U Rotary three-view blackboard |
| 06/22/1988 | CN87215141U Suction cup type teaching compass with single stem |
| 06/15/1988 | CN87206746U Magnetic teaching aids |
| 06/08/1988 | CN87206621U Dual purpose magnetic blackboard for plain and arc surface |
| 06/01/1988 | CN87214466U Multipurpose teaching ruler |
| 05/24/1988 | US4746123 Method for scrambling and unscrambling illustrations/a puzzle drawing game |
| 05/18/1988 | CN86107623A Multi-functional equipment for erasing hand-writings on the magnetic writing board |
| 05/11/1988 | CN87213786U Multifunction electronic trainer for writing, drawing, tracing and simulating |
| 05/11/1988 | CN86201874U Threefunction pen |
| 05/04/1988 | CN87205175U Multipurpose drawing instrument for teaching |
| 05/03/1988 | US4741107 Artwork aid adapted for facilitating placement of lettering along arc of a circle |
| 04/27/1988 | CN86107027A Low reflective, non-coating blackboard and its making method |
| 04/26/1988 | US4740161 Educational toy for stimulating writing |
| 04/19/1988 | CA1235296A1 Method and apparatus for selecting lipstick shades |
| 04/13/1988 | CN86210018U Integrative wall volume for drawing teaching diagram and teaching by demonstration |
| 03/02/1988 | CN85102015B Auto-erasing motor-driven blackboard |
| 02/17/1988 | CN87210830U Copybook |
| 02/10/1988 | CN86208107U Speeded-up means for practising with words |
| 02/10/1988 | CN85203037U Multi-purpose ruler |
| 02/03/1988 | CN85101953B Pigment used for colouring of water writing paper |
| 01/27/1988 | CN86104541A Model for calligraphy practising |
| 01/07/1988 | EP0171409B1 Combinatory element game for covering surfaces with various aspects, particularly to be used as a game or a surface covering |
| 01/05/1988 | US4717342 Combinable set of quadratic elements |
| 12/23/1987 | CN85204933U Strip type movable blackboard having auto-cleaning function |
| 12/16/1987 | CN86205606U Blackboard capable of changing face automatically and wiping original handwriting |
| 12/02/1987 | CN87200804U Board for tracing characters |
| 11/18/1987 | CN85205650U Movable dirt-free blackboard with automatic cleaner |
| 11/11/1987 | CN86204954U Blackboard with movable board |
| 11/11/1987 | CN86202044U Multi-purpose blackboard of blackish green colour |
| 11/07/1987 | CN86206704U Calligraphy exercise imitation board |
| 11/04/1987 | EP0243552A1 Stencil book |
| 11/04/1987 | CN87202270U Compositive blackborad |
| 10/31/1987 | CN86209165U Revolving blackboard |
| 10/31/1987 | CN86207531U Reelable blackboard |
| 10/21/1987 | CN87203589U Magnetic teaching aids |
| 10/14/1987 | CN86102246A Cirele-round self-erasing dust-free blackboard |
| 10/14/1987 | CN86102160A 升降黑板 Lifting blackboard |
| 10/03/1987 | CN86201313U Versatile teaching rule for rapid drawing |
| 10/03/1987 | CN85204880U Compasses used on glass blackboard |
| 09/09/1987 | CN86205879U Automatic drawing instrument of link curves |
| 09/02/1987 | CN86202456U Multi-purpose educational compasses |
| 09/01/1987 | US4690644 Teaching apparatus, particularly for teaching shorthand |
| 08/25/1987 | US4689020 Writing aid |
| 08/19/1987 | CN86201500U Set square with vernier |
| 08/11/1987 | US4685885 For teaching the correct manner of printing letters and/or numerals |
| 08/05/1987 | CN86205819U 粉笔套 Chalk sets |
| 07/29/1987 | CN86206939U Teaching compass with fixable center piece |
| 07/29/1987 | CN86100309A Manufacture process for electric lighted blackboard |
| 07/14/1987 | US4679328 Lettering template |
| 07/08/1987 | CN86200341U Transmission belt-type blackboard |
| 07/01/1987 | CN86204597U Multifunctional electrically driven winding blackboard for teaching |
| 07/01/1987 | CN85205157U Parabolic-hyperbolic drawing instrument |
| 06/30/1987 | US4677203 Chromogenic fluoran derivatives |
| 06/02/1987 | US4669986 Writing training device |
| 06/02/1987 | US4669984 Light dot matrix game assembly |
| 05/27/1987 | CN86206793U Exercise tool for writing standard characters |
| 05/27/1987 | CN86205223U Compasses for blackboard |