| Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409) | |
|---|---|
| 01/2011 | |
| 01/05/2011 | CN201693933U Blackboard eraser |
| 01/05/2011 | CN201693917U Blackboard |
| 01/05/2011 | CN201693916U Blackboard with detachable dust-receiving slot |
| 12/2010 | |
| 12/29/2010 | CN201685626U Blackboard chalk tray collector |
| 12/29/2010 | CN201685625U Blackboard eraser automatically absorbing dust |
| 12/29/2010 | CN201685624U Dust absorption blackboard eraser |
| 12/29/2010 | CN201685623U Automatic erasing device of blackboard |
| 12/29/2010 | CN201685622U Large-area electric blackboard eraser |
| 12/29/2010 | CN201685607U Movable blackboard |
| 12/29/2010 | CN101927646A Magnetism eraser |
| 12/29/2010 | CN101927645A Solar energy eraser |
| 12/23/2010 | WO2010117226A3 Blackboard erasing implement |
| 12/22/2010 | CN201677649U Hand-injury-free blackboard eraser |
| 12/22/2010 | CN201677648U Blackboard eraser |
| 12/22/2010 | CN201677647U Blackboard eraser with convenient cleaning |
| 12/22/2010 | CN201677639U Ruler |
| 12/22/2010 | CN201677632U Teaching blackboard |
| 12/22/2010 | CN201677631U Dust-collecting blackboard |
| 12/16/2010 | WO2010142200A1 Erasable board structure |
| 12/15/2010 | CN201670023U Dustproof blackboard eraser |
| 12/15/2010 | CN201670022U Dual-purpose blackboard eraser |
| 12/08/2010 | CN201665101U Dust-absorption blackboard eraser |
| 12/08/2010 | CN201665100U Electric blackboard eraser |
| 12/08/2010 | CN201665099U Blackboard eraser |
| 12/08/2010 | CN101905616A Dual-body blackboard eraser |
| 12/08/2010 | CN101905615A Glove-type eraser |
| 12/08/2010 | CN101905614A Traction type blackboard eraser |
| 12/08/2010 | CN101905613A Blackboard wiping device |
| 12/01/2010 | CN201659813U Dustproof blackboard eraser |
| 12/01/2010 | CN201659812U Cyclone dust removal blackboard eraser |
| 12/01/2010 | CN201659811U Multifunctional blackboard eraser |
| 12/01/2010 | CN201659800U Multifunctional rolling type automatic blackboard |
| 12/01/2010 | CN201659798U Teaching dust-free blackboard |
| 11/2010 | |
| 11/24/2010 | CN201646179U Rotary type dust-suction blackboard eraser |
| 11/24/2010 | CN201646178U Duct collection blackboard eraser |
| 11/24/2010 | CN201646177U Device capable of cleaning chalk marks automatically |
| 11/24/2010 | CN201646176U Blackboard eraser connected with dust collector |
| 11/24/2010 | CN201646175U Dustproof blackboard eraser |
| 11/24/2010 | CN201646174U Telescopic dust-absorption blackboard eraser |
| 11/24/2010 | CN201646173U Dust-collecting blackboard eraser |
| 11/24/2010 | CN201646172U Modified blackboard eraser |
| 11/24/2010 | CN201646171U Dust-free blackboard eraser |
| 11/24/2010 | CN201646170U Retractable blackboard eraser with replaceable felt |
| 11/24/2010 | CN201646169U Blackboard brush |
| 11/24/2010 | CN201646168U Electric blackboard eraser |
| 11/24/2010 | CN201646167U Multifunction white board brush |
| 11/24/2010 | CN201646166U White board brush |
| 11/24/2010 | CN201646165U Pulley blackboard eraser |
| 11/24/2010 | CN201646164U Multifunctional blackboard eraser |
| 11/24/2010 | CN201646154U English-teaching one-step synchronous four-line form drawer with erasers |
| 11/24/2010 | CN201646122U Convenient blackboard |
| 11/24/2010 | CN201640538U Glove for chalk writing |
| 11/24/2010 | CN101890861A Automatic blackboard brush |
| 11/18/2010 | US20100287720 Soap Dispensing Bath Mitt |
| 11/18/2010 | US20100287719 Two Sided Cleaning Device |
| 11/17/2010 | CN201638161U Electromagnetic whiteboard eraser |
| 11/17/2010 | CN201633418U Electric rotating automatic eraser for child education |
| 11/17/2010 | CN201633417U Dust-collecting blackboard eraser |
| 11/17/2010 | CN201633416U Electric dust collection eraser for teaching |
| 11/17/2010 | CN201633415U Unidirectional baffle-type dust-collecting blackboard eraser |
| 11/17/2010 | CN201633414U Dustproof blackboard eraser |
| 11/17/2010 | CN201633413U Blackboard eraser |
| 11/17/2010 | CN201633412U Multi-functional dust collecting box |
| 11/17/2010 | CN201633411U Automatic blackboard eraser |
| 11/17/2010 | CN201633410U Blackboard eraser capable of preventing chalk dust from flying |
| 11/17/2010 | CN201633409U Electric dust-absorption blackboard eraser |
| 11/17/2010 | CN201633408U Dedusting device for blackboard |
| 11/17/2010 | CN201633407U Automatic blackboard eraser |
| 11/17/2010 | CN201633406U Wet-erasable type blackboard eraser |
| 11/17/2010 | CN201633405U Overturn automatic wetting dust-absorption blackboard eraser |
| 11/17/2010 | CN201633404U Automatic blackboard eraser |
| 11/17/2010 | CN201633403U Blackboard wiping device with guide rail |
| 11/17/2010 | CN201633402U Cleaning device for blackboard slot |
| 11/17/2010 | CN201633382U Multi-functional blackboard |
| 11/17/2010 | CN201633381U Sanitary blackboard device |
| 11/17/2010 | CN201633380U Blackboard chalkrail structure convenient for cleaning |
| 11/17/2010 | CN201633379U Convenient blackboard |
| 11/10/2010 | CN201626217U Multi-purpose electrostatic dedusting eraser |
| 11/10/2010 | CN201626216U Handheld eraser for automatically cleaning chalk dust |
| 11/10/2010 | CN201626210U 改进的电动黑板 Improved electric blackboard |
| 11/10/2010 | CN201626208U Intelligent blackboard |
| 11/10/2010 | CN101879832A Automatic blackboard cleaning device |
| 11/10/2010 | CN101554269B Multifunctional teaching desk with dust-suction blackboard eraser |
| 11/03/2010 | CN201619365U Dust collection blackboard eraser |
| 11/03/2010 | CN201619364U Multifunctional blackboard eraser |
| 11/03/2010 | CN201619363U Blackboard eraser capable of being unpicked and washed |
| 11/03/2010 | CN201619344U Blackboard groove with convenient cleaning |
| 11/03/2010 | CN101875279A Horizontal push-pull type blackboard eraser |
| 10/2010 | |
| 10/27/2010 | CN201613762U 一种防尘黑板擦 One kind of eraser dust |
| 10/27/2010 | CN201613761U 一种吸尘黑板擦 One kind of eraser dust |
| 10/27/2010 | CN201613760U 自动黑板擦 Automatic eraser |
| 10/27/2010 | CN201613759U 可储藏粉笔的多功能黑板擦 Versatility can be stored chalk eraser |
| 10/27/2010 | CN201613748U 新型电动水洗黑板 New electric washing blackboards |
| 10/27/2010 | CN201613741U 一种黑板擦 One kind of eraser |
| 10/27/2010 | CN101870225A Blackboard |
| 10/20/2010 | CN201610029U 一种吸尘板擦 One kind of eraser dust |
| 10/20/2010 | CN201610028U 电动吸尘黑板擦 Electric vacuum eraser |
| 10/20/2010 | CN201610027U 手套式黑板擦 Glove eraser |
| 10/20/2010 | CN201610026U 黑板擦 Eraser |
| 10/20/2010 | CN201610025U 一种具有颈部自动调整的师生专用板刷托装置 Students and Teachers scrubbing brush holder apparatus having automatic adjustment of the neck |