B43L 21 - Blackboard or slate-cleaning devices

Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409)
05/2011
05/18/2011	CN102059899A Quick blackboard eraser
05/18/2011	CN102059891A Mobile blackboard
05/18/2011	CN102059889A Multifunctional blackboard
05/11/2011	CN201824746U Sliding type self-wiping blackboard
05/11/2011	CN201824745U Blackboard eraser
05/11/2011	CN201824744U Blackboard eraser
05/11/2011	CN201824743U Dust absorption blackboard eraser
05/11/2011	CN201824742U Environment-friendly blackboard brush
05/11/2011	CN201824741U Dustproof eraser
05/11/2011	CN201824740U Dust absorption eraser
05/11/2011	CN201824739U Electric dust-collecting blackboard eraser
05/11/2011	CN201824738U Dust suction-type electric blackboard eraser
05/11/2011	CN201824737U Blackboard eraser
05/11/2011	CN201824736U Novel blackboard eraser
05/11/2011	CN201824735U Novel blackboard combination eraser
05/11/2011	CN201824730U Ruler
05/11/2011	CN201824720U Blackboard convenient to clean
05/11/2011	CN102049950A Blackboard eraser capable of preventing chalk dust from flying
05/11/2011	CN102049949A Blackboard eraser
05/11/2011	CN102049948A Adsorbing blackboard eraser
05/04/2011	CN201816369U High-speed environmental-friendly blackboard eraser
05/04/2011	CN201816368U Blackboard eraser with dust sucking function
05/04/2011	CN201816367U Dust collection device for blackboards
05/04/2011	CN201816366U Double-faced eraser
05/04/2011	CN201816365U Blackboard eraser with dust collection function
05/04/2011	CN201816364U Sanitary and convenient blackboard eraser
05/04/2011	CN201816363U Dustproof blackboard eraser
05/04/2011	CN201816362U Armguard dustproof blackboard wiper
05/04/2011	CN201816361U Multi-purpose chalk eraser
05/04/2011	CN201816343U Multifunction hand-power elevation automatic dust-removal louver blackboard
05/04/2011	CN201816340U Vacuum-absorbed colorful particle dot matrix display type consumables-free and environment-friendly blackboard
05/04/2011	CN201816339U Environment-friendly and energy-saving blackboard
05/04/2011	CN201816335U Self-erasing dust-free writing board
05/04/2011	CN102039758A An automatic chalk-dust-absorbing blackboard eraser
05/04/2011	CN102039757A Triangular ruler blackboard eraser
04/2011
04/27/2011	CN201808373U Chalk dust collecting device
04/27/2011	CN201808372U Multifunctional intelligent board eraser
04/27/2011	CN201808371U Novel blackboard eraser
04/27/2011	CN201808370U Dust collecting blackboard eraser
04/27/2011	CN201808369U Dust-proof blackboard eraser
04/27/2011	CN201808368U Multifunctional blackboard eraser
04/27/2011	CN201808367U Eraser
04/27/2011	CN201808366U Skid-proof blackboard eraser
04/27/2011	CN201808365U Dustproof blackboard eraser
04/27/2011	CN201808346U Motor-driven dust-free blackboard
04/27/2011	CN201808343U Teaching blackboard
04/27/2011	CN201808342U Movable mutual erasing dust-collecting blackboard
04/27/2011	CN201808341U Movable blackboard capable of automatically wiping
04/27/2011	CN201806113U Pencil box with eraser
04/27/2011	CN102029849A Dust-free blackboard eraser
04/27/2011	CN102029845A Self-erasure environmental-friendly blackboard
04/20/2011	CN201800402U Blackboard eraser capable of cleaning dust
04/20/2011	CN201800401U Dustproof blackboard eraser
04/20/2011	CN201800400U Multi-functional blackboard eraser
04/20/2011	CN201800399U Blackboard eraser
04/20/2011	CN201800385U Electric water-washing and self-drying dustproof blackboard
04/20/2011	CN201800384U Novel blackboard
04/20/2011	CN201799424U Automatic cleaning device for dustless chalk eraser
04/20/2011	CN102019799A Electric blackboard eraser
04/13/2011	CN201792666U Full-automatic blackboard eraser
04/13/2011	CN201792665U Dustproof dual-purpose blackboard eraser
04/13/2011	CN201792664U Dust-proof blackboard eraser
04/13/2011	CN201792663U Dust collecting blackboard eraser without electric power
04/13/2011	CN201792662U Brush surface-replaceable sponge
04/13/2011	CN201792661U Blackboard eraser capable of preventing chalk powder
04/13/2011	CN201792660U Blackboard eraser capable of accommodating chalk
04/13/2011	CN201792659U Blackboard eraser convenient to use
04/13/2011	CN201792658U Blackboard eraser with extension rod
04/13/2011	CN201792638U Blackboard
04/13/2011	CN201790250U Teaching aid integrated device
04/12/2011	US7921501 Eraser for blackboard
04/06/2011	CN201788602U Multifunctional teaching rod
04/06/2011	CN201784359U Blackboard eraser for two purposes of dry and wet uses
04/06/2011	CN201784358U New type blackboard eraser
04/06/2011	CN201784357U Multifunctional blackboard eraser
04/06/2011	CN201784356U Dustproof chalk eraser
04/06/2011	CN201784355U Clean blackboard eraser
04/06/2011	CN201784354U Dustproof blackboard eraser
04/06/2011	CN201784353U Blackboard eraser
04/06/2011	CN201784352U Blackboard eraser ruler
04/06/2011	CN201784351U Double-sided blackboard eraser
04/06/2011	CN201784332U Water wiping type combined blackboard
04/06/2011	CN102001252A Roller-type dust collection blackboard brush and working method thereof
03/2011
03/30/2011	CN201777053U Finger-cot type blackboard eraser
03/30/2011	CN201777052U Telescopic blackboard eraser
03/30/2011	CN201777051U Magnetic blackboard eraser
03/30/2011	CN101992635A Dustproof chalk eraser
03/23/2011	CN201769573U Dustproof blackboard eraser
03/23/2011	CN201769572U Foldable blackboard eraser
03/23/2011	CN201769571U Blackboard eraser
03/23/2011	CN201769570U Finger stall blackboard eraser
03/23/2011	CN201769569U Novel blackboard eraser
03/23/2011	CN201769568U Chalk brush
03/23/2011	CN201769567U Blackboard eraser
03/23/2011	CN201769566U Telescopic blackboard eraser
03/23/2011	CN201769565U White board eraser with magnetic face side
03/23/2011	CN201769547U Novel blackboard for children
03/23/2011	CN201769544U Teaching blackboard
03/23/2011	CN201769543U Blackboard with chalk dust containing device
03/23/2011	CN201769542U Quick-erase blackboard

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