B43L 21 - Blackboard or slate-cleaning devices

Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409)
12/2013
12/25/2013	CN203358142U Blackboard eraser with corner clearing tail
12/25/2013	CN203358130U Self-erasing type three-side blackboard
12/25/2013	CN103465699A Cylinder roller brush and cyclone collector-based blackboard cleaning method and blackboard eraser
12/25/2013	CN103465698A Dust collecting blackboard eraser and application method thereof
12/25/2013	CN103465697A Dustproof quick-dry blackboard eraser
12/25/2013	CN102343753B Full-automatic blackboard eraser with dust sucking device
12/18/2013	CN203344582U Multifunctional blackboard eraser
12/18/2013	CN203344581U Environment-friendly blackboard brush
12/18/2013	CN203344580U Combined blackboard eraser
12/18/2013	CN203344579U Full-automatic blackboard
12/18/2013	CN203344578U Wet-type dustless blackboard cleaning device
12/18/2013	CN203344577U Blackboard brush
12/18/2013	CN203344558U Blackboard
12/18/2013	CN203341170U Powder sucking box
12/18/2013	CN103448435A Integrated arc-rail type blackboard wiping system
12/18/2013	CN103448434A Blackboard eraser allowing cyclic utilization
12/18/2013	CN103448433A Disposable eraser
12/18/2013	CN103448432A Whiteboard eraser
12/18/2013	CN103448427A Electrostatic cleaning blackboard
12/11/2013	CN203331658U Chalk dust absorbing recycling device
12/11/2013	CN203331657U Dust-free type blackboard eraser
12/11/2013	CN203331656U Atomizing dedusting blackboard eraser
12/11/2013	CN203331655U Telescopic detachable board wiper
12/11/2013	CN203331644U Novel Chinese teaching plate
12/11/2013	CN103434316A Blackboard eraser with glove
12/11/2013	CN103434315A Dust-proof blackboard eraser and application method thereof
12/11/2013	CN103434314A Electric blackboard eraser capable of absorbing chalk dust
12/11/2013	CN103434313A Blackboard eraser capable of wiping blackboard and blackboard slot
12/04/2013	CN203317979U Automatic blackboard erasing device
12/04/2013	CN203317961U Double-sided erasable blackboard
12/04/2013	CN203314317U Teaching chalk box
12/04/2013	CN103419535A 可伸缩黑板擦 Scalable eraser
12/04/2013	CN103419532A Magnetic dustproof environment-friendly writing board (chalkboard) tool
11/2013
11/27/2013	CN203311673U Combined-type Chinese teaching aid
11/27/2013	CN203311652U Teaching plate for marketing major class
11/27/2013	CN203305742U Electric dust collecting blackboard eraser
11/27/2013	CN203305741U Blackboard dust removing system
11/27/2013	CN203305740U Environment-friendly dust collection blackboard eraser
11/27/2013	CN203305739U Dual-end dust collection blackboard eraser
11/27/2013	CN203305717U Blackboard with electric dust collection blackboard erasers
11/27/2013	CN103407314A Automatic blackboard eraser device
11/20/2013	CN203293784U Dust collector type blackboard eraser
11/20/2013	CN203293783U Dust-absorbing chalkboard eraser
11/20/2013	CN203293782U Blackboard
11/20/2013	CN203293781U Blackboard eraser dedusting device
11/20/2013	CN203293780U Automatic blackboard eraser
11/20/2013	CN203293779U Alcohol blackboard eraser
11/20/2013	CN203293772U Novel crawler-type dust-free blackboard
11/20/2013	CN203293771U Blackboard with board eraser
11/13/2013	CN203282924U Novel electrostatic dust removal board wiper
11/13/2013	CN203282923U Blackboard eraser
11/13/2013	CN203282922U Automatic blackboard eraser for Chinese teaching
11/13/2013	CN203282921U Environment-friendly clean-keeping blackboard
11/13/2013	CN103386849A Environment-friendly blackboard eraser
11/06/2013	CN203267594U Dust stopping machine
11/06/2013	CN203267593U Dustproof blackboard eraser
11/06/2013	CN203267592U Electric dust-collection blackboard eraser applied to teaching
11/06/2013	CN203267591U Blackboard eraser
11/06/2013	CN203267590U Self-power-generating dust absorption blackboard eraser
11/06/2013	CN203267589U Dust-absorbing board eraser
11/06/2013	CN203267588U 黑板擦 Eraser
11/06/2013	CN203267587U Multifunctional cleaning brush
11/06/2013	CN203267567U Left-and-right-moving blackboard capable of being erased
11/06/2013	CN203267564U Novel teaching white board
10/2013
10/30/2013	CN203254843U Eraser duct collection joint based on duct collector
10/30/2013	CN203254842U Blackboard eraser capable of absorbing chalk powder
10/30/2013	CN203254841U Dust-collection blackboard eraser
10/30/2013	CN203254840U Multifunctional chalk eraser
10/30/2013	CN203254839U 可更换黑板擦 Replaceable eraser
10/30/2013	CN203254838U Replaceable chalkboard eraser
10/30/2013	CN203254837U Novel blackboard eraser
10/30/2013	CN203254826U Blackboard with eraser
10/23/2013	CN203246233U Dust collection blackboard eraser
10/23/2013	CN203246232U Dust-free blackboard eraser
10/23/2013	CN203246231U Novel semi-automatic blackboard
10/23/2013	CN103358781A Electrostatic dust collection blackboard eraser
10/16/2013	CN203236926U Dust removing box of blackboard brush
10/16/2013	CN203236925U Bidirectional circulation automatic dust removing blackboard
10/16/2013	CN203236924U Novel blackboard eraser
10/16/2013	CN203236923U Novel blackboard eraser
10/16/2013	CN103350597A Environment-friendly type dust-free blackboard eraser
10/09/2013	CN203228561U Electrostatic dust collecting blackboard eraser
10/09/2013	CN203228560U 伸缩式黑板擦 Retractable eraser
10/09/2013	CN203228559U 多功能黑板擦 Multifunction eraser
10/09/2013	CN203228558U Combined type blackboard eraser
10/09/2013	CN203228546U Novel blackboard
10/09/2013	CN102363401B Automatic dry erasing blackboard eraser for vertically sliding blackboard
10/02/2013	CN203225034U Stretchable teaching rod
10/02/2013	CN203221802U Retractable blackboard eraser
10/02/2013	CN203221801U Blackboard eraser
10/02/2013	CN203221800U Dust collection blackboard eraser
10/02/2013	CN203221799U 防尘黑板擦 Dust eraser
10/02/2013	CN203221798U Multifunctional automatic blackboard eraser
10/02/2013	CN203221797U Scrubbing device with dust storage device
10/02/2013	CN203221796U Automatic dust-absorbing blackboard eraser
10/02/2013	CN203221795U Counter flow type automatic dust collection blackboard eraser
10/02/2013	CN203221794U Rotary electric dust suction blackboard eraser
10/02/2013	CN203221793U Fully-automatic remotely-controlled dust-free blackboard eraser
10/02/2013	CN203221792U Environment-friendly blackboard eraser
10/02/2013	CN203221791U Rotary electric blackboard eraser

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