Patents
Sitemap › B43 - Writing or drawing implements; Bureau accessories › B43L - Articles for writing or drawing upon; Accessories for writing or drawing › B43L 21 - Blackboard or slate-cleaning devices
Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409)
12/2003
12/24/2003CN2594046Y Blackboard eraser
12/24/2003CN2594045Y Crawler dustproof blackboard eraser
12/24/2003CN2594044Y Environmental protecting blackboard eraser
12/17/2003CN2592396Y Narrow-slit dust-free blackboard
12/03/2003CN2589222Y Novel health care blackboard eraser
12/03/2003CN2589221Y Blackboard eraser
12/03/2003CN2589216Y Rotary easily erasing blackboard
11/2003
11/26/2003CN2587671Y Electricity rechargeable dust-removing electric eraser for blackboard
11/26/2003CN2587670Y Musical instrument key type blackboard eraser cleaner
11/26/2003CN2587669Y Blacboard eraser
11/26/2003CN1457991A Telescopic displacement dust sucking blackboard eraser with self-control dust sucking tube
11/19/2003CN2586593Y Dust-removing board eraser
11/12/2003CN2585768Y Multifunctional electronic brush
11/12/2003CN2585767Y Ash collector of eraser
11/12/2003CN1454789A Magnetic writing blackboard and complete permanent magnetic pen and eraser
11/05/2003CN2584418Y Eraser with magnet
10/2003
10/29/2003CN2582894Y Two-sided rolled groove blackboard
10/22/2003CN2581203Y Blackboard eraser
10/15/2003EP1148997B1 Creativity center apparatus and method of use
10/15/2003CN2579679Y Dust suction blackboard eraser
10/15/2003CN2579678Y Dust suction brush for blackboard
10/15/2003CN2579677Y Magnetic blackboard eraser and driving mechanism
10/01/2003CN2576498Y Water type duster of blackboard eraser
10/01/2003CN2576497Y Automatic dust-proof black board eraser
09/2003
09/24/2003CN2574913Y Adhensive tape
09/24/2003CN2574912Y Ink bottle
09/24/2003CN2574909Y Simple apparatus for trisection of an angle and arc
09/17/2003CN2573283Y Electric dust-suction blackboard eraser
09/17/2003CN2573282Y Electric blackboard eraser
09/17/2003CN2573281Y Blackboard eraser
09/17/2003CN2573280Y Dust-suction blackboard eraser
09/17/2003CN2573279Y Dust-suction blackboard eraser
09/17/2003CN2573278Y Environmental protection electric blackboard eraser
09/17/2003CN2573277Y Air bag type blackboard eraser
09/17/2003CN2573276Y Multifunctional dust-collecting blackboard eraser
09/17/2003CN2573275Y Easy-to-handle blackboard eraser
09/17/2003CN2573266Y Rotary auto-erasing dualpurpose blackboard
09/17/2003CN2573264Y Electric-controlled automatic erasing writing white board
09/16/2003US6620500 Fluoropolymers or cellulose acetates
09/10/2003CN2571604Y Dust-suction blackboard eraser
09/10/2003CN2571603Y Dust free eraser for blackboard
09/10/2003CN1440879A negative-pressure black board eraser
09/03/2003CN2570053Y dust-absorbing blackboard eraser
09/03/2003CN2570052Y Blackboard eraser
09/03/2003CN2570051Y Magnetic blackboard eraser
09/03/2003CN2570050Y Multifunctional blackboard eraser
09/03/2003CN1439535A Automatic blackboard eraser
08/2003
08/27/2003CN2568428Y Dust sucking eraser
08/27/2003CN2568427Y Eraser
08/27/2003CN2568424Y Remote controlled self-cleaning blackboard
08/20/2003CN2567057Y Eraser
08/20/2003CN2567056Y Eraser
08/20/2003CN2567052Y Blackboard
08/20/2003CN2567051Y Blackboard with millipore for dust absorption
08/13/2003CN2565638Y Rolling dustless blackboard eraser
08/06/2003CN2564368Y Dust absorbing chalk wiper
08/06/2003CN2564367Y Dust absorbing blackboard eraser
08/06/2003CN2564366Y Dust absorbing blackboard eraser
08/06/2003CN2564365Y Handy blackboard eraser
08/06/2003CN2564364Y Automatic blackboard eraser
07/2003
07/30/2003CN2562998Y Electric eraser for blackboard
07/30/2003CN2562997Y Automatic dipping and sucking and wiping device for teaching board
07/30/2003CN2562986Y Combined magnetic chalk and blackboard eraser
07/30/2003CN1432479A Eraser for magnetic writing board
07/23/2003CN2561599Y Automatic dust-collecting blackboard eraser
07/23/2003CN2561598Y Rolling eraser
07/23/2003CN2561597Y Magnetic eraser
07/23/2003CN1431102A Electric blackboard
07/16/2003CN2560508Y Dust-proof eraser for blackboard
07/16/2003CN2560507Y Dust-absorbing eraser for blackboard
07/09/2003CN2559498Y Dust removing blackboard erazer
07/09/2003CN2559496Y Dust-suction blackboard slot
06/2003
06/25/2003CN2557341Y 黑板擦 Eraser
06/18/2003CN2556044Y Dust-collecting eraser
06/18/2003CN2556043Y Eraser capable of absorbing chalk dust
06/18/2003CN2556038Y 自动清洁黑板 Automatic cleaning blackboard
06/11/2003CN2555174Y Splitting eraser
06/11/2003CN2555173Y Eraser with container
06/11/2003CN2555167Y Rotary blackboard having self-erasing, dustless large storage and enviromental protection functions
06/04/2003CN2554017Y Eraser capable of changing head
05/2003
05/28/2003CN2552731Y Dust-collecting blackboard eraser
05/28/2003CN2552730Y Dust-removing blackboard eraser device for teaching
05/28/2003CN2552729Y 黑板擦 Eraser
05/28/2003CN2552728Y Dust-collecting blackboard eraser
05/28/2003CN2552727Y Fully automatic blackboard eraser
05/28/2003CN2552726Y Convenient practical blackboard eraser
05/28/2003CN2552722Y Automatic words-erasing dust-proof blackboard
05/28/2003CN2552714Y 自动粉笔 Automatic chalk
05/21/2003CN2551481Y Dust-absorbing blackboard eraser
05/21/2003CN2551480Y Chalk eraser
05/21/2003CN2551479Y Dust-proof blackboard eraser
05/21/2003CN2551478Y Dust-proof blackboard eraser
05/20/2003US6564415 Surface treating device
05/14/2003CN1417042A Blackboard eraser with finger-pressed dust collector and its usage
05/14/2003CN1417041A Dust-sucking eraser
05/07/2003CN2548806Y Dustproof blackboard eraser
04/2003
04/30/2003CN2547526Y Dust-reducing eraser
04/23/2003CN2546218Y Full-automatic dustless blackboard erazor
04/17/2003DE20300992U1 Label for painting or writing tools has a magnet or cleaning element which can be a disc magnet or magnetic film
04/16/2003CN2544963Y Automatic erasing blackboard
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