| Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409) | |
|---|---|
| 03/2013 | |
| 03/20/2013 | CN202806098U 粉笔末处理器 Chalk end processor |
| 03/20/2013 | CN202806097U Double-surface eraser |
| 03/20/2013 | CN202806096U Blackboard eraser with built-in chalk |
| 03/20/2013 | CN202806070U Automatically-cleaned fountain pen blackboard |
| 03/20/2013 | CN202806069U Automatically-cleaned dust-free blackboard |
| 03/20/2013 | CN102975536A Dust-proof blackboard eraser |
| 03/20/2013 | CN102975535A Full-automatic erasing device |
| 03/20/2013 | CN102975534A Automatic blackboard erasing machine |
| 03/13/2013 | CN202782396U Convenient blackboard eraser |
| 03/13/2013 | CN202782395U Blackboard eraser with handle |
| 03/13/2013 | CN202782394U Automatic blackboard eraser capable of achieving erasure of any area |
| 03/13/2013 | CN202782393U Efficient and dust-free blackboard wiping device |
| 03/13/2013 | CN202782392U Dustproof blackboard eraser |
| 03/13/2013 | CN202782391U Environment-friendly blackboard eraser |
| 03/13/2013 | CN202782390U Dust absorbing blackboard eraser |
| 03/13/2013 | CN202782389U Drum type blackboard eraser |
| 03/13/2013 | CN202782388U Dust absorption chalk eraser |
| 03/13/2013 | CN202782387U Foldable blackboard eraser |
| 03/13/2013 | CN202782386U Motor-driven blackboard eraser |
| 03/13/2013 | CN202782385U Blackboard eraser provided with telescopic rod |
| 03/13/2013 | CN202782384U Fully automatic blackboard brush |
| 03/13/2013 | CN202782383U Whiteboard eraser |
| 03/13/2013 | CN202782382U Dry-wet blackboard eraser |
| 03/13/2013 | CN202782381U Chalk-holding chalkboard eraser |
| 03/13/2013 | CN202782380U Combined sliding plate automatic dust sweeping device |
| 03/13/2013 | CN202782379U Water-squeezing type blackboard eraser |
| 03/13/2013 | CN202782343U Electric chalkboard with rolling eraser |
| 03/13/2013 | CN202782342U Expansion blackboard |
| 03/13/2013 | CN102968084A Electric eraser circuit |
| 03/13/2013 | CN102963187A Blackboard eraser |
| 03/13/2013 | CN102963186A Dustproof blackboard eraser |
| 03/13/2013 | CN102963185A Water-spraying blackboard eraser |
| 03/13/2013 | CN102963184A Water adding and drainage device for automatic blackboard |
| 03/13/2013 | CN102963172A Blackboard device convenient to clean |
| 03/06/2013 | CN202764550U Dustproof blackboard eraser |
| 03/06/2013 | CN202764549U Dust absorption eraser |
| 03/06/2013 | CN202764548U Vacuum dust-sucking blackboard eraser |
| 03/06/2013 | CN202764547U Automation blackboard eraser |
| 03/06/2013 | CN202764540U Multifunctional teaching aid |
| 03/06/2013 | CN202764530U Teaching chalkboard |
| 03/06/2013 | CN102950943A 黑板擦 Eraser |
| 03/01/2013 | DE202012008163U1 Schwamm Sponge |
| 02/2013 | |
| 02/27/2013 | CN202753666U Novel blackboard eraser |
| 02/27/2013 | CN202753665U Electric blackboard eraser |
| 02/27/2013 | CN202753646U Blackboard with automatic blackboard eraser |
| 02/27/2013 | CN202753645U Teaching writing board provided with light-emitting devices and cleaning brushes |
| 02/27/2013 | CN102941765A Blackboard erasing device |
| 02/27/2013 | CN102941764A Chalk cap type eraser |
| 02/20/2013 | CN202742919U Retractable blackboard eraser |
| 02/20/2013 | CN202742918U Dual-purpose dustproof blackboard eraser device |
| 02/20/2013 | CN202742917U Environment-friendly power-driven blackboard eraser |
| 02/20/2013 | CN202742916U Electric dust-collection blackboard eraser |
| 02/20/2013 | CN202742915U Eraser capable of being sleeved on hand |
| 02/20/2013 | CN202742914U Immersion water quick-drying blackboard eraser |
| 02/13/2013 | CN202727773U Blackboard eraser with handle |
| 02/13/2013 | CN202727772U Dust absorption blackboard eraser |
| 02/13/2013 | CN202727771U 防尘黑板擦 Dust eraser |
| 02/13/2013 | CN202727770U Novel erasing brush |
| 02/13/2013 | CN202727769U Blackboard eraser for reducing chalk flying dust |
| 02/13/2013 | CN202727768U Blackboard eraser capable of holding chalks |
| 02/13/2013 | CN202727767U Blackboard eraser provided with storage box |
| 02/13/2013 | CN202727766U Board eraser for green board or white board |
| 02/13/2013 | CN202727732U Environment-friendly dust removal blackboard |
| 02/13/2013 | CN202727727U Multifunctional automatic dedusting blackboard |
| 02/13/2013 | CN102922922A 多功能黑板擦 Multifunction eraser |
| 02/13/2013 | CN102922921A 电动黑板擦 Electric eraser |
| 02/13/2013 | CN102922920A Dust-prevention cleaning eraser |
| 02/13/2013 | CN102922919A Blackboard eraser |
| 02/13/2013 | CN102922918A 自动黑板擦 Automatic eraser |
| 02/13/2013 | CN102922917A Detachable telescopic blackboard eraser |
| 02/06/2013 | CN202716641U 黑板清洁器 Blackboard cleaner |
| 02/06/2013 | CN202716640U Blackboard eraser |
| 02/06/2013 | CN202716639U Split type water-absorption blackboard eraser |
| 02/06/2013 | CN202716638U Dust-absorption blackboard eraser |
| 02/06/2013 | CN202716637U Blackboard eraser facilitating clean of blackboard |
| 02/06/2013 | CN202716636U Whiteboard eraser |
| 02/06/2013 | CN202716627U Dust-free environment-friendly combined multi-media teaching board |
| 02/06/2013 | CN202716625U Convenient blackboard |
| 02/06/2013 | CN202716624U Novel blackboard |
| 02/06/2013 | CN102910010A Handheld automatic blackboard eraser |
| 02/06/2013 | CN102910009A Novel electric blackboard eraser |
| 02/06/2013 | CN102910008A Blackboard eraser |
| 02/06/2013 | CN102910007A Novel blackboard eraser |
| 02/06/2013 | CN102910002A Environment-friendly blackboard |
| 02/05/2013 | US8365340 Multipurpose tool with moveably arranged plates |
| 01/2013 | |
| 01/30/2013 | CN202711518U Teaching rod |
| 01/30/2013 | CN202703049U 伸缩黑板刷 Telescopic blackboard brush |
| 01/30/2013 | CN202703048U Blackboard eraser with chalk box |
| 01/30/2013 | CN202703047U Environmentally-friendly blackboard eraser |
| 01/30/2013 | CN202703046U Novel blackboard eraser |
| 01/30/2013 | CN202703045U Dust absorption blackboard eraser |
| 01/30/2013 | CN202703044U Dust-absorption type power-driven blackboard eraser |
| 01/30/2013 | CN202703043U 黑板擦 Eraser |
| 01/30/2013 | CN202703042U Blackboard eraser |
| 01/30/2013 | CN202703041U Novel blackboard eraser |
| 01/30/2013 | CN202703040U Portable blackboard eraser |
| 01/30/2013 | CN202703039U Easy blackboard eraser |
| 01/30/2013 | CN202703027U Multifunctional blackboard slot |
| 01/30/2013 | CN202703014U Blackboard with eraser |
| 01/30/2013 | CN102896958A Portable blackboard eraser |