B43L 21 - Blackboard or slate-cleaning devices

Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409)
12/2007
12/05/2007	CN200984907Y Dust-free blackboard eraser
12/05/2007	CN200984906Y 黑板擦 Eraser
12/05/2007	CN200984905Y 电动黑板擦 Electric eraser
12/05/2007	CN200984904Y Automatic wet type blackboard cleaner
11/2007
11/28/2007	CN200981430Y 黑板擦 Eraser
11/28/2007	CN200981424Y Novel blackboard
11/22/2007	US20070267042 Cleaning article
11/21/2007	CN200977810Y Chalk wiping brush
11/21/2007	CN200977805Y Blackboard groove
11/14/2007	CN200974415Y Electric dust-absorbing type blackboard eraser
11/14/2007	CN200974414Y Dust-absorbing type blackboard eraser
11/14/2007	CN200974413Y Chalk brush
11/14/2007	CN200974409Y Easily-wiping blackboard
11/07/2007	CN200970987Y Eraser
11/07/2007	CN200970986Y Eraser
11/07/2007	CN200970985Y Electric eraser
11/07/2007	CN200970984Y Dust absorption eraser
11/07/2007	CN200970983Y Environment protection dust absorption eraser
11/07/2007	CN200970982Y Eraser
11/07/2007	CN200970981Y Eraser
11/07/2007	CN200970980Y Movable dust-collection cover of eraser
11/07/2007	CN200970979Y Dust absorption eraser
11/07/2007	CN200970968Y 除尘黑板 Dust blackboard
11/07/2007	CN200970967Y Blackboard
11/07/2007	CN101066652A Concentratively controlled multimedia teaching system
10/2007
10/31/2007	CN200967363Y Environment protective blackboard brush
10/31/2007	CN200967362Y Dust-free blackboard eraser
10/31/2007	CN200967353Y Blackboard
10/31/2007	CN101062643A Telescopic blackboard eraser
10/24/2007	CN200964006Y Electric dust-absorbing blackboard eraser
10/24/2007	CN200964005Y 多功能黑板擦 Multifunction eraser
10/24/2007	CN200964004Y 电动黑板擦 Electric eraser
10/24/2007	CN200964003Y 黑板擦 Eraser
10/24/2007	CN200963114Y Blackboard eraser vacuum cleaner
10/17/2007	CN200960999Y Box for placing in blackboard eraser
10/17/2007	CN200960816Y Water film separation type dust separating and removing device
10/17/2007	CN200960810Y Automatic wiping-free blackboard
10/17/2007	CN101054039A Hand-rail type blackboard clean
10/10/2007	CN200957724Y 黑板擦 Eraser
10/10/2007	CN200957717Y Electric self-cleaning blackboard
10/10/2007	CN200957716Y Blackboard
10/10/2007	CN200957715Y Electric self-erasing blackboard
10/03/2007	CN200954743Y 黑板擦 Eraser
10/03/2007	CN200954742Y Blackboard eraser-cover cap
10/03/2007	CN101045420A Automatic eraser device
09/2007
09/27/2007	WO2007107640A1 Whiteboard eraser
09/19/2007	CN200948716Y Telescopic blackboard eraser
09/19/2007	CN200948715Y Electronic environment protection eraser
09/19/2007	CN200948714Y Dust-proof blackboard eraser
09/19/2007	CN200948709Y Dust-free water scrubbing blackboard
09/12/2007	CN200945789Y Dust-removing blackboard cleaner
09/12/2007	CN200945788Y 多功能黑板擦 Multifunction eraser
09/12/2007	CN200945787Y 黑板擦 Eraser
09/12/2007	CN200945786Y Dust-proof blackboard eraser
09/12/2007	CN200945780Y Blackboard with dust-proof blackboard eraser
09/05/2007	CN200942662Y Free-falling dustfree simple blackboard eraser
09/05/2007	CN200942063Y Separating and storing ash device
08/2007
08/29/2007	CN200939783Y Telescopic eraser
08/29/2007	CN200939782Y Duster eraser
08/29/2007	CN200939781Y Dust collecting eraser
08/29/2007	CN200939780Y Health eraser
08/29/2007	CN200939779Y Telescopic spraying eraser
08/29/2007	CN200939778Y Dust-less eraser sleeve
08/29/2007	CN200939777Y Dust-less eraser
08/29/2007	CN200939776Y Long service eraser with replacable rags
08/29/2007	CN200939775Y Dust-less eraser
08/29/2007	CN101024359A Multifunction teaching writing demonstration board
08/22/2007	CN2936786Y Eraser with holder
08/22/2007	CN2936785Y Eraser with device for absorbing chalk dust
08/22/2007	CN2936781Y Hand rotating automatic erasing dustless blackboard
08/22/2007	CN2936780Y Built-in dust collecting rolling blackboard
08/22/2007	CN101020401A Blackboard erasing deduster
08/15/2007	CN2933906Y 滑动式黑板擦 Sliding eraser
08/15/2007	CN2933905Y Dustless chalk eraser
08/15/2007	CN2933897Y Blackboard with dust collector
08/08/2007	CN2931153Y Dust-free blackboard eraser
08/01/2007	CN2928536Y Hand dust suction blackboard eraser
08/01/2007	CN2928535Y Dust-proof blackboard eraser
08/01/2007	CN2928534Y Portable blackboard eraser
08/01/2007	CN2928528Y Convenient cleaning blackboard
07/2007
07/25/2007	CN2925923Y Dust-collecting blackboard sponge
07/25/2007	CN2925915Y Automatic teaching blackboard
07/18/2007	CN2923374Y Dust-absorbing blackboard eraser
07/18/2007	CN2923373Y Magnetic blackboard eraser with chalk powder collection cabin
07/18/2007	CN2923372Y Slide-groove type blackboard eraser
07/18/2007	CN2923371Y Dust-free blackboard eraser
07/18/2007	CN2923370Y Dust-free blackboard eraser
07/18/2007	CN2923358Y Novel blackboard
07/11/2007	EP1806239A1 Eraser
07/11/2007	CN2920691Y Non-erazing automatic positioning writing board
07/04/2007	CN2918094Y Chalk dust absorbing blackboard eraser
07/04/2007	CN2918088Y Dust absorption blackboard
07/04/2007	CN2918087Y Tactics directing board for writing, drawing, playing chess and ball games
06/2007
06/27/2007	CN2915552Y 黑板擦 Eraser
06/27/2007	CN2915551Y Dust-suction blackboard eraser
06/27/2007	CN2915550Y Vacuum dust collection device capable of wiping blackboard
06/27/2007	CN2915549Y Blackboard eraser
06/27/2007	CN2915548Y Dust-free blackboard eraser
06/27/2007	CN2915547Y White board wiping eraser
06/27/2007	CN2915546Y Chalk eraser

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