| Patents for B43L 1 - Repeatedly-usable boards or tablets for writing or drawing (5,148) |
|---|
| 12/03/1997 | CN2269315Y Writing and viewing screen |
| 11/26/1997 | CN2268633Y Exercising board for writing brush using water as ink |
| 11/26/1997 | CN2268632Y Blackboard |
| 11/26/1997 | CN2268631Y Sandwiched glass blackboard |
| 11/12/1997 | CN2267165Y Electric writing or drawing board |
| 11/04/1997 | CA2121663C Blackboard |
| 10/29/1997 | CN2265907Y Moving blakboard |
| 10/29/1997 | CN2265906Y Two-layer portable writing board |
| 10/22/1997 | CN2265298Y White writingboard made of ceramic enamel |
| 10/15/1997 | CN2264671Y Washed rolling blackboard |
| 10/08/1997 | CN2264087Y Dustless blackboard |
| 10/07/1997 | US5674104 Magnetic pen |
| 09/17/1997 | CN2262497Y Enamel plate for children to writing |
| 08/19/1997 | US5658635 Bulletin board and accessory attaching mechanism |
| 08/13/1997 | CN2259295Y Improved wear-resistant electric blackboard |
| 08/09/1997 | CA2196716A1 Drawing device with multimedia enhancement |
| 07/30/1997 | EP0785898A1 Dispensing assembly |
| 07/30/1997 | CN2258644Y Dust-free basic color changeable teaching-display board |
| 07/30/1997 | CN2258458Y Rotary type automatic erasing dust-free blackboard |
| 07/23/1997 | CN2258119Y Repeatedly-usable drawing-board |
| 07/09/1997 | CN2257521Y Magnetic portable writing board |
| 07/02/1997 | CN2257248Y Reflecting-proof blackboard with light source |
| 06/04/1997 | CN2255364Y Dual-purpose blackboard with functions of rolling hanging-map and writing on blackboard |
| 05/28/1997 | CN2254832Y Magnetic, no-chalk type black-board for teaching in class |
| 05/21/1997 | CN1150094A Locating means of movable blackboard |
| 05/07/1997 | EP0734564A4 An erasable sign |
| 05/07/1997 | EP0679283A4 An erasable product. |
| 05/07/1997 | CN2253700Y Improved structure for pencil groove of drawing-board |
| 05/06/1997 | US5626478 Portable coaching device and method |
| 04/30/1997 | CN2253297Y Magnetic writing-board |
| 04/30/1997 | CN2253296Y Magnetic multi-purpose studying article case |
| 04/23/1997 | CN2252714Y Blackboard with absorbing magnetic powder |
| 04/23/1997 | CN2252713Y Blackboard having automatic dust absorbing function |
| 04/16/1997 | CN2252119Y Self-erasing non-dust blackboard |
| 04/16/1997 | CN2252118Y Chinese brush character practising board |
| 04/08/1997 | CA2138699C Inkless blackboard display panels |
| 03/26/1997 | CN2250262Y Folding health teaching and writing board |
| 03/04/1997 | US5607312 Writing board with an automatic erase device |
| 02/26/1997 | CN2248134Y Rolling self dust-removing health blackboard |
| 02/19/1997 | CN2247605Y Teaching blackboard |
| 02/04/1997 | US5599189 Reusable learning aid |
| 01/29/1997 | CN2246074Y Magnetic blackboard and its special pen and eraser |
| 01/22/1997 | CN2245536Y Multipurpose automatic dust removing blackboard |
| 01/15/1997 | CN1140262A Microcapsules for magnetic display and method for producing magnetic display sheet therewith |
| 01/08/1997 | CN2244487Y Teaching writing board |
| 01/01/1997 | CN2243987Y Automatic dust-free blackboard |
| 01/01/1997 | CN2243986Y Multifunctional blackboard |
| 01/01/1997 | CN2243985Y Composite silk surface hollow drawing board |
| 01/01/1997 | CN1139406A Polymeric film |
| 12/25/1996 | CN2243392Y Multifunctional blackboard |
| 12/25/1996 | CN2243391Y Pore absorbing dustless blackboard |
| 12/18/1996 | CN2242796Y Rotating-type multi-function blackboard |
| 12/18/1996 | CN2242795Y Lined board |
| 12/18/1996 | CN2242794Y White plate for keeping record of events of teaching |
| 12/04/1996 | CN2241635Y Water-writing blackboard for teaching purpose |
| 10/23/1996 | CN2238150Y Writing board with eraser |
| 10/16/1996 | EP0588918B1 A label |
| 10/15/1996 | US5565253 Dispensing assembly |
| 10/09/1996 | CN2236953Y Combined gravity erasing dustless writing board |
| 10/02/1996 | EP0734564A1 An erasable sign |
| 10/02/1996 | CN2236407Y Magnetic screen blackboard |
| 10/02/1996 | CN2236406Y Dustless box type blackboard |
| 10/02/1996 | CN2236405Y Self cleaning blackboard |
| 10/02/1996 | CN2236404Y Colour teaching board with nylon stick |
| 09/18/1996 | CN2235376Y Notice board |
| 09/17/1996 | USRE35329 Electronic blackboard and accessories such as writing tools |
| 09/11/1996 | EP0730983A1 Erasable marker device |
| 08/21/1996 | EP0726847A1 Polymeric film |
| 08/21/1996 | CN2233324Y Automatic blackboard |
| 08/21/1996 | CN2233323Y Chalk dust ledge with dust-collecting cup |
| 08/21/1996 | CN2233322Y Deformation-proof frame for writing board |
| 08/08/1996 | DE19603841A1 Device for imprinting magnetic indicating surface with signs |
| 07/31/1996 | CN1127705A 磁性书写板 Magnetic writing board |
| 07/17/1996 | CN2231185Y Word exercising book with copybook cut in intaglio |
| 07/10/1996 | CN2230666Y Self cleaning and dust-collecting blackboard eraser |
| 07/03/1996 | CN2230234Y Colour calligraphy and painting board |
| 06/26/1996 | CN2229884Y Device for moving up-and-down blackboard |
| 06/25/1996 | US5529501 Electronic writing/erasing apparatus for rewritable heat sensitive sheet |
| 06/19/1996 | CN2229357Y Writing board with illuminating device |
| 06/12/1996 | EP0715969A1 Erasable marking method and apparatus therefor |
| 06/12/1996 | CN2228848Y Multifunctional health learning board |
| 06/05/1996 | EP0435927B1 Message cover |
| 05/08/1996 | CN2226630Y Theft-proof cash safe box in transit |
| 05/08/1996 | CN1121875A Visitors' board |
| 05/01/1996 | CN2225974Y Copying board for children |
| 05/01/1996 | CN2225973Y White board made of plastic film and hard board for painting and calligraphy |
| 04/25/1996 | WO1996011870A1 Dispensing assembly |
| 04/25/1996 | DE4437113A1 Hollow wall contg. display equipment |
| 04/24/1996 | CN2225362Y Writing and drawing board for writing brush |
| 04/17/1996 | EP0500741B1 Magnetic visual display |
| 04/17/1996 | CN2224736Y Automatic cleaning and dust collecting blackboard |
| 04/17/1996 | CN2224735Y Rolling writing board |
| 04/17/1996 | CN2224734Y Writing board |
| 04/17/1996 | CN1120499A Dustless blackboard |
| 04/16/1996 | US5508086 Electrostatic notice board system |
| 04/10/1996 | CN2224093Y Mathematics Excercising board for pupil |
| 04/03/1996 | CN2223693Y Controlled displaying blackboard |
| 04/02/1996 | US5503891 Flexible magnet attractant display mat |
| 03/26/1996 | US5501603 Modularized visual training aid for classroom instruction |
| 03/20/1996 | CN2222619Y Portable blackboard |