| Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409) | |
|---|---|
| 07/2013 | |
| 07/24/2013 | CN203078110U Water spraying blackboard eraser |
| 07/24/2013 | CN203078109U Dual-purpose and comfortable circular board eraser |
| 07/24/2013 | CN203078108U Blackboard eraser |
| 07/24/2013 | CN203078107U Blackboard eraser with water spraying device |
| 07/24/2013 | CN203078106U Double-faced blackboard eraser |
| 07/24/2013 | CN203078105U Blackboard eraser |
| 07/24/2013 | CN203078052U Rotary self-wiping dust-rise-prevention short blackboard |
| 07/24/2013 | CN203078051U Blackboard |
| 07/24/2013 | CN203078048U Modern blackboard system |
| 07/24/2013 | CN203078046U Dust absorption blackboard |
| 07/24/2013 | CN203078044U Automatic dust absorbing blackboard |
| 07/24/2013 | CN203078040U Full-automatic blackboard |
| 07/24/2013 | CN203078038U Blackboard with automatic blackboard erasing function |
| 07/24/2013 | CN203078037U Dust collection blackboard |
| 07/24/2013 | CN203078036U Dustproof blackboard |
| 07/24/2013 | CN203078035U Dust-free blackboard |
| 07/24/2013 | CN203077946U Chalk sleeve |
| 07/24/2013 | CN103213437A Blackboard eraser |
| 07/24/2013 | CN103213436A Automatic blackboard dust collection device |
| 07/24/2013 | CN103213435A Dust-collecting blackboard eraser |
| 07/24/2013 | CN103213434A Dust-free board eraser |
| 07/17/2013 | CN203063449U Tool for cleaning blackboard |
| 07/17/2013 | CN203063448U Multifunctional blackboard eraser |
| 07/17/2013 | CN203063447U Dust suction blackboard eraser |
| 07/17/2013 | CN203063446U Novel automatic blackboard eraser |
| 07/17/2013 | CN203063445U Blackboard eraser capable of sucking chalk dust |
| 07/17/2013 | CN203063444U Blackboard erase with dust collector |
| 07/17/2013 | CN203063443U Blackboard eraser with dust collector |
| 07/17/2013 | CN203063442U Novel blackboard eraser |
| 07/17/2013 | CN203063441U Multifunctional blackboard eraser |
| 07/17/2013 | CN203063440U Electric blackboard eraser |
| 07/17/2013 | CN203063439U Multifunctional blackboard |
| 07/17/2013 | CN203063438U Dustproof blackboard eraser |
| 07/17/2013 | CN203063405U Novel blackboard |
| 07/17/2013 | CN203063403U Multifunctional self-wiping blackboard |
| 07/17/2013 | CN203063401U Blackboard |
| 07/17/2013 | CN203063400U Blackboard with electric blackboard eraser |
| 07/17/2013 | CN103204023A Dust absorption spray type blackboard eraser |
| 07/17/2013 | CN103204022A Dust-free blackboard eraser |
| 07/17/2013 | CN103204019A Intelligent blackboard system |
| 07/10/2013 | CN203054497U Electric blackboard eraser circuit |
| 07/10/2013 | CN203046651U Novel dustproof blackboard eraser |
| 07/10/2013 | CN203046650U Dustproof blackboard eraser |
| 07/10/2013 | CN203046649U Blackboard eraser easy to use |
| 07/10/2013 | CN203046648U Dustproof blackboard eraser |
| 07/10/2013 | CN203046647U Dust-free blackboard eraser |
| 07/10/2013 | CN203046646U Spray type blackboard eraser clamping shell |
| 07/10/2013 | CN203046645U Blackboard eraser convenient to use |
| 07/10/2013 | CN203046618U Integrated blackboard device integrating blackboard and eraser |
| 07/10/2013 | CN203046613U Blackboard for teaching |
| 07/10/2013 | CN103192640A Blackboard eraser capable of absorbing chalk dust |
| 07/10/2013 | CN103192639A Blackboard wiping machine with cleaning function |
| 07/10/2013 | CN103192638A Replaceable blackboard eraser |
| 07/10/2013 | CN103192637A Blackboard eraser |
| 07/10/2013 | CN103192630A Batten type automatic overturning back cleaning blackboard |
| 07/04/2013 | US20130167313 Whiteboard eraser |
| 07/03/2013 | CN203032237U Novel blackboard eraser |
| 07/03/2013 | CN203032236U Dust-removing blackboard eraser |
| 07/03/2013 | CN203032235U Blackboard eraser |
| 07/03/2013 | CN203032234U Dust-absorbing eraser |
| 07/03/2013 | CN203032233U Blackboard eraser |
| 07/03/2013 | CN203032232U Dust-free blackboard eraser |
| 07/03/2013 | CN203032231U Storage type blackboard eraser |
| 07/03/2013 | CN203032230U Novel type blackboard eraser |
| 07/03/2013 | CN203032229U Blackboard eraser |
| 07/03/2013 | CN203032228U Electric blackboard washing device |
| 07/03/2013 | CN203032227U 简易黑板擦 Easy eraser |
| 07/03/2013 | CN203032196U Electric dust-free blackboard |
| 07/03/2013 | CN203032192U Novel voice blackboard |
| 07/03/2013 | CN203032191U Direct current heating water vapor mist type dust-absorbing blackboard for teaching |
| 07/03/2013 | CN203032189U 多功能黑板 Multifunction blackboard |
| 07/03/2013 | CN203032188U Movable self-cleaning blackboard |
| 07/03/2013 | CN203028389U Automatic dual-purpose chalk box |
| 07/03/2013 | CN203028188U Glove capable of speeding up blackboard-writing |
| 07/03/2013 | CN103182890A Expansion cylinder type magnetic blackboard eraser |
| 07/03/2013 | CN103182887A Self-cleaning blackboard |
| 06/2013 | |
| 06/26/2013 | CN203019925U Dust-collecting blackboard eraser |
| 06/26/2013 | CN203019924U Novel teaching aid |
| 06/26/2013 | CN203019923U Chalk cap type blackboard eraser |
| 06/26/2013 | CN203019922U Strip-shaped blackboard brush |
| 06/26/2013 | CN203015909U Teacher glove special for board writing |
| 06/26/2013 | CN103171341A Autorotation roller type dust absorption blackboard eraser |
| 06/26/2013 | CN103171340A Dust absorption blackboard eraser |
| 06/26/2013 | CN103171339A Dust absorption blackboard eraser |
| 06/26/2013 | CN103171338A Telescopic dedusting blackboard eraser |
| 06/26/2013 | CN103171337A Replaceable type chalk brush |
| 06/26/2013 | CN103171336A Dust-free blackboard |
| 06/19/2013 | CN203004862U Blackboard cleaning mechanism |
| 06/19/2013 | CN203004861U Blackboard cleaning reciprocating motion mechanism |
| 06/19/2013 | CN203004860U Blackboard eraser with handle |
| 06/19/2013 | CN203004859U Blackboard eraser device |
| 06/19/2013 | CN203004858U Multifunctional dust-pressing chalk brush |
| 06/19/2013 | CN203004857U Dust-absorbing eraser |
| 06/19/2013 | CN203004856U Blackboard eraser capable of spraying water |
| 06/19/2013 | CN203004855U Dust-collecting blackboard wiper |
| 06/19/2013 | CN203004854U Water spraying dustproof chalk eraser |
| 06/19/2013 | CN203004853U Blackboard eraser capable of collecting dust |
| 06/19/2013 | CN203004852U Chalk dust absorber |
| 06/19/2013 | CN203004851U Blackboard with dust collector |
| 06/19/2013 | CN203004850U Gravity-sensed electric dust collection eraser |