| Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409) | |
|---|---|
| 03/2014 | |
| 03/26/2014 | CN203496522U Dust collection blackboard eraser |
| 03/26/2014 | CN203496521U Dustproof chalkboard eraser |
| 03/26/2014 | CN203496520U Magnetic board eraser |
| 03/26/2014 | CN103660736A Multifunctional board eraser |
| 03/26/2014 | CN103660735A Intelligent active dust absorbing blackboard |
| 03/26/2014 | CN103660734A Dustproof board wiper |
| 03/26/2014 | CN103660733A Quick-dry dust-free blackboard eraser |
| 03/26/2014 | CN103660732A Multifunctional blackboard eraser |
| 03/19/2014 | CN203485643U Blackboard eraser with dust collector |
| 03/19/2014 | CN203485642U Supplemental cartridge-type eraser |
| 03/19/2014 | CN203485631U Intelligent sliding blackboard for teaching |
| 03/19/2014 | CN103640376A Extensible type blackboard eraser |
| 03/12/2014 | CN203472369U Improved blackboard eraser |
| 03/12/2014 | CN203472368U Electromagnetic drive dust collection device |
| 03/12/2014 | CN203472367U Dedusting blackboard eraser |
| 03/12/2014 | CN203472366U Dust sucking device of chalkboard eraser |
| 03/12/2014 | CN203472365U Dustproof environment-friendly electric blackboard eraser |
| 03/12/2014 | CN203472364U Blackboard cleaner |
| 03/12/2014 | CN203472363U Automatic whiteboard eraser |
| 03/12/2014 | CN203472362U Blackboard eraser convenient to replace |
| 03/12/2014 | CN203472361U Environment-friendly dust-free chalkboard eraser |
| 03/12/2014 | CN203472348U Blackboard |
| 03/12/2014 | CN203472347U White board for teaching |
| 03/12/2014 | CN103625182A Dust-absorption blackboard eraser |
| 03/06/2014 | WO2014035099A1 Blackboard eraser device |
| 03/05/2014 | CN203460593U Integrated arc track type blackboard cleaning system |
| 03/05/2014 | CN203460592U Dust-removal blackboard eraser |
| 03/05/2014 | CN203460591U Novel blackboard eraser |
| 03/05/2014 | CN203460590U Blackboard eraser |
| 03/05/2014 | CN203460589U Blackboard cleaner |
| 03/05/2014 | CN203460578U Blackboard dust remover |
| 03/05/2014 | CN203460572U Chalk sleeve added with dust collection device |
| 03/05/2014 | CN103612530A Flexible-belt-type automatic blackboard wiping device |
| 03/05/2014 | CN103612529A Extension-type blackboard eraser |
| 03/05/2014 | CN103612523A Novel blackboard |
| 03/05/2014 | CN103612519A Whiteboard |
| 02/2014 | |
| 02/26/2014 | CN203449818U Novel blackboard eraser with dust sucking device |
| 02/26/2014 | CN203449817U Roller brush type dedusting blackboard eraser |
| 02/26/2014 | CN203449816U Dust-free blackboard eraser with cleanout fluid arranged inside |
| 02/26/2014 | CN203449815U Water spraying blackboard eraser |
| 02/26/2014 | CN103600608A Dust collection blackboard eraser |
| 02/26/2014 | CN103600603A Whiteboard with automatic rebounding eraser |
| 02/19/2014 | CN203438734U Folding type dust-absorbing blackboard eraser |
| 02/19/2014 | CN203438733U Blackboard eraser |
| 02/19/2014 | CN203438732U 黑板擦 Eraser |
| 02/19/2014 | CN203438731U Dust collection device |
| 02/19/2014 | CN203438730U Novel spindle-type blackboard eraser |
| 02/19/2014 | CN203438729U Semi-automatic mechanical booster blackboard eraser |
| 02/19/2014 | CN203438720U Self-wiping blackboard |
| 02/19/2014 | CN203438719U Blackboard dust removing system |
| 02/19/2014 | CN103587306A Blackboard eraser capable of sucking chalk powder |
| 02/19/2014 | CN103587296A Self-erasing crawler blackboard |
| 02/12/2014 | CN203427505U Sealing type dust-free chalk blackboard eraser |
| 02/12/2014 | CN203427504U Electric dust-collecting blackboard eraser |
| 02/12/2014 | CN203427503U Blackboard cleaner for classrooms |
| 02/12/2014 | CN203427502U Blackboard groove brush |
| 02/12/2014 | CN203427495U Negative pressure dust collection environment-friendly blackboard |
| 02/12/2014 | CN103568669A 黑板擦 Eraser |
| 02/12/2014 | CN103568668A Blackboard with electric blackboard eraser |
| 02/12/2014 | CN103568667A Dust collecting groove |
| 02/12/2014 | CN103568666A Automatic whiteboard eraser |
| 02/12/2014 | CN103568657A Blackboard with dust collection function |
| 02/05/2014 | CN103552410A Chalk brush |
| 02/05/2014 | CN103552409A Water type self-cleaning mark removing blackboard eraser |
| 02/05/2014 | CN103552408A Chalk brush |
| 01/2014 | |
| 01/30/2014 | DE202014000114U1 Tafelwischvorrichtung Table wiping device |
| 01/29/2014 | CN203410213U Chalk eraser with replaceable sponge |
| 01/29/2014 | CN203410212U Remote automatic brushing blackboard |
| 01/29/2014 | CN203410205U Double-sided blackboard |
| 01/29/2014 | CN103538399A Automatic dust-collecting blackboard eraser |
| 01/29/2014 | CN103538398A 防尘黑板擦 Dust eraser |
| 01/29/2014 | CN103538396A Double-drum flexible multifunctional blackboard |
| 01/15/2014 | CN203391536U Environment-friendly dust-free blackboard eraser |
| 01/15/2014 | CN203391535U Blackboard for preventing dust from flying |
| 01/15/2014 | CN203391534U 防尘黑板擦 Eraser dust |
| 01/15/2014 | CN203391533U Dust-proof blackboard eraser |
| 01/15/2014 | CN203391532U Conveniently-used blackboard eraser |
| 01/15/2014 | CN203391523U Rolling type self-cleaning blackboard |
| 01/15/2014 | CN103507521A Pollution-free blackboard for teaching |
| 01/15/2014 | CN103507520A Novel dustproof chalk eraser |
| 01/15/2014 | CN103507519A Dust-collection blackboard eraser |
| 01/15/2014 | CN103507518A Practical white board eraser |
| 01/15/2014 | CN103507517A Multifunctional eraser |
| 01/15/2014 | CN103507516A Novel blackboard eraser |
| 01/14/2014 | US8628501 Syringe sterilization cap |
| 01/08/2014 | CN203381405U Blackboard eraser capable of absorbing powder |
| 01/08/2014 | CN203381404U Novel blackboard eraser with electrostatic dust removal function |
| 01/08/2014 | CN203381403U Dust removing eraser |
| 01/08/2014 | CN203381402U Device for clearing chalk dust |
| 01/08/2014 | CN203381401U Washable dual-purpose blackboard eraser capable of collecting dust and spraying water |
| 01/08/2014 | CN203381400U Glove type blackboard eraser |
| 01/08/2014 | CN203381399U Automatic eraser |
| 01/08/2014 | CN203381398U Electric blackboard cleaning device |
| 01/08/2014 | CN203381388U Self-erasing portable blackboard for teaching |
| 01/08/2014 | CN103496269A 电动黑板 Electric blackboard |
| 01/01/2014 | CN203371959U Multifunctional blackboard erasing and writing device with machine vision |
| 01/01/2014 | CN103481706A Blackboard eraser capable of removing accumulated dust |
| 12/2013 | |
| 12/25/2013 | CN203359165U Writing board collecting frame with cleaning function |
| 12/25/2013 | CN203358144U Blackboard eraser with dust collection function for English teaching |
| 12/25/2013 | CN203358143U Easily used blackboard eraser |