| Patents for B43L 1 - Repeatedly-usable boards or tablets for writing or drawing (5,148) |
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| 03/08/2000 | CN2367475Y Moveable multilayer combined blackboard |
| 03/08/2000 | CN2367474Y Rolling blackboard |
| 03/08/2000 | CN2367473Y Lifting blackboard |
| 03/08/2000 | CN2367472Y Form board for practising basic strokes of Chinese charactors |
| 03/01/2000 | CN2366287Y Multi-purpose book for writing |
| 03/01/2000 | CN2366286Y Repeatedly-usable magnetic board for exercising Chinese calligraphy |
| 02/23/2000 | CN2365074Y Rolling multi-function blackboard |
| 02/23/2000 | CN2365073Y Multi-function stereoscopic blackboard |
| 02/16/2000 | CN2363895Y Dustless blackboard |
| 02/16/2000 | CN2363894Y 读写板 Write board |
| 02/15/2000 | US6025856 Magnetic indication sheet printing method and magnetic indication sheet printing apparatus |
| 02/10/2000 | WO2000006395A1 Electronic blackboard system |
| 02/09/2000 | CN2362713Y Writing board |
| 02/09/2000 | CN2362712Y Photo-controlled lattice type arbitrarily erasing magnetic writing board |
| 02/09/2000 | CN1243789A Reusable film for writing or painting on it |
| 02/03/2000 | WO2000005081A1 Writing board with reference lines which are invisible from a distance and fabrication process |
| 02/03/2000 | CA2338227A1 Writing board having reference lines invisible at a distance and processfor producing the same |
| 02/02/2000 | EP0976579A1 Display system |
| 02/02/2000 | CN2361484Y Chalk dust recoverable blackboard |
| 02/02/2000 | CN2361483Y Magnetic blackboard |
| 02/02/2000 | CN2361482Y Rotary blackboard |
| 02/02/2000 | CN2361481Y Background colour changeable chalk writing board |
| 02/02/2000 | CN2361480Y Multi-functional drawing board |
| 02/02/2000 | CN2361479Y Dustless blackboard |
| 01/27/2000 | CA2241239A1 Puzzle for you to color or draw |
| 01/26/2000 | CN2360275Y Dustless eraser |
| 01/19/2000 | CN2359132Y 画图板 Drawing board |
| 01/19/2000 | CN2359131Y 空气屏式教学黑板 Air-screen blackboard teaching |
| 01/12/2000 | CN2357926Y Dust-free blackboard |
| 01/12/2000 | CN2357925Y Photo-electric controlled arbitrary scribbling and erasing magnetic writing board |
| 01/12/2000 | CN2357924Y Fiberglass reinforced plastics blackboard |
| 01/12/2000 | CN1048338C Hand-writable liquid crystal board set |
| 01/05/2000 | CN2356864Y Self-erazing blackboard |
| 12/29/1999 | CN2355892Y Belt circulation blackboard |
| 12/28/1999 | US6009240 Electronic white-board equipment and electronic white-board system |
| 12/28/1999 | US6007891 Message board eraser, eraser holder and attaching mechanism |
| 12/28/1999 | US6007734 Comprising magnetic particles having a particle diameter of 10 to 150 mum, 0.01 to 0.5 wt % of an antistatic agent, 1 to 10% by weight of an organic thickening agent, 0.1 to 10% by weight of a colorant and a balance of an organic dispersing medium |
| 12/22/1999 | CN2354770Y Rotary automatic dustless erased blackboard |
| 12/22/1999 | CN2354769Y Multifunctional blackboard |
| 12/15/1999 | CN2353556Y Folding-type blackboard |
| 12/15/1999 | CN2353555Y Composite writing board |
| 12/14/1999 | US6000946 Collaborative drawing device |
| 12/08/1999 | CN2352365Y Simple and moveable black-board |
| 12/08/1999 | CN2352364Y Sheet with Chinese character on it for people to learn calligraphy with soft (brush) pen |
| 12/07/1999 | US5997309 Erasable drawing board |
| 12/01/1999 | CN2351294Y Non-dust blackboard device |
| 11/24/1999 | EP0958943A1 Panel with curved surface |
| 11/24/1999 | CN2350207Y Free moving blackboard slot |
| 11/23/1999 | US5989676 Bulletin board notepad holder and notepad holder attaching mechanism |
| 11/17/1999 | CN2349029Y Black (white) board structure with automatic rotation erasing |
| 11/17/1999 | CN2349028Y Electrostatic sorption writing board |
| 11/17/1999 | CN1235098A Process for making unreflected maintaining-free blackboard |
| 11/10/1999 | CN2347783Y Portable drawing board |
| 11/10/1999 | CN1234774A Method for producing type of print capable of being erased, selectively cleaned and laminated |
| 11/03/1999 | CN2346598Y Dust-less blackboard |
| 11/03/1999 | CN2346597Y Reflecting-proof movable blackboard |
| 11/03/1999 | CN2346596Y Movable blackboard having lattice for teaching Chinese character |
| 11/03/1999 | CN2346595Y Health blackboard |
| 11/02/1999 | US5976663 Bulletin board accessories and accessory attaching mechanism |
| 10/27/1999 | CN2345365Y Multifunction automatic cleaning and dust-absorption blackboard |
| 10/27/1999 | CN2345364Y Double-surface blackboard capable of keep writing on it |
| 10/27/1999 | CN2345363Y Multifunction health-care shelf-type writing board |
| 10/26/1999 | US5972493 Gelatin microcapsules for magnetic display comprising magnetic powder and nonmagnetic powder dispersing in a mixture of a low boiling point solvent and a high boiling point solvent |
| 10/20/1999 | CN2344188Y Automatic turning dust-removing blackboard |
| 10/20/1999 | CN2344187Y 写字板 WordPad |
| 10/20/1999 | CN2344186Y Magnetic black-white dual-purpose writing board |
| 10/20/1999 | CN2344185Y Combined portable multi-purpose teaching board |
| 10/13/1999 | CN2342994Y Rolling-type teaching writing board |
| 10/13/1999 | CN2342993Y Board for writing or drawing |
| 10/06/1999 | CN2341810Y Magnetic writing board |
| 10/06/1999 | CN2341809Y Optional sticked white plate |
| 10/06/1999 | CN2341808Y 全自动黑板 Automatic blackboard |
| 10/06/1999 | CN2341807Y Three dimension stereo blackboard |
| 09/29/1999 | CN2340624Y Easily writing and erasing durable blackboard |
| 09/22/1999 | CN2339415Y Belt-type automatic blackboard |
| 09/22/1999 | CN2339414Y Dot-control board for practising writing |
| 09/21/1999 | US5955170 Bulletin board mail holder and mail holder attaching mechanism |
| 09/15/1999 | CN2338174Y Electrically driven and roll-able flexible black-board |
| 09/15/1999 | CN2338173Y Multi-functional black-board |
| 09/15/1999 | CN1228372A Belt type blackboard |
| 09/08/1999 | CN2337624Y Photoelectrical writing board |
| 09/08/1999 | CN2336977Y Rolling blackboard |
| 09/08/1999 | CN2336976Y Electric dustless self-cleaning blackboard |
| 09/08/1999 | CN1227800A Method for manufacturing magnetic erasable teaching yellow-board |
| 09/07/1999 | US5948498 Multi-purpose message board |
| 09/07/1999 | US5947304 Magnetic mount marker holder |
| 09/01/1999 | CN2335797Y Water wash type dustless blackboard |
| 08/24/1999 | US5941713 Mobile display board arrangement |
| 08/18/1999 | CN2334065Y Multi-functional English teaching board |
| 08/17/1999 | US5938449 Reusable writing board with locking function |
| 08/11/1999 | CN2332584Y Crawler-type blackboard |
| 08/11/1999 | CN2332251Y Dual-side blackboard |
| 08/04/1999 | CN2331217Y Assembly writing board with support |
| 07/28/1999 | CN2330229Y Health-care reading and writing plate |
| 07/27/1999 | US5928756 Bulletin board accessories and accessory attaching mechanism |
| 07/21/1999 | CN2329531Y Dust-absorbing teaching blackboard |
| 07/21/1999 | CN2329530Y Appliance for practising calligraphy and body-building |
| 06/30/1999 | CN2326449Y 彩色磁力书写板 Color magnetic writing board |
| 06/30/1999 | CN2326448Y 电磁书写板 Magnetic writing board |
| 06/23/1999 | CN2325233Y Electromagnetic dot matrix white writing board |