| Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409) | |
|---|---|
| 01/2013 | |
| 01/30/2013 | CN102896957A Blackboard eraser |
| 01/30/2013 | CN102896956A Blackboard eraser with handle |
| 01/30/2013 | CN102896948A Automatic cleaning type blackboard |
| 01/23/2013 | CN202685704U 黑板擦 Eraser |
| 01/23/2013 | CN202685703U Blackboard with blackboard eraser |
| 01/23/2013 | CN202685702U 黑板擦 Eraser |
| 01/23/2013 | CN202685701U Easily erased energy-saving blackboard |
| 01/23/2013 | CN202685700U Blackboard eraser with handle |
| 01/23/2013 | CN202685699U Dust-free chalk eraser |
| 01/23/2013 | CN202685698U Blackboard eraser |
| 01/23/2013 | CN202685697U 黑板擦 Eraser |
| 01/23/2013 | CN202685696U Blackboard eraser |
| 01/23/2013 | CN202685673U Dust-free blackboard |
| 01/23/2013 | CN202685672U Blackboard capable of being automatically erased |
| 01/23/2013 | CN102887024A Stretchable dry-wet blackboard eraser |
| 01/23/2013 | CN102887023A 防尘黑板擦 Eraser dust |
| 01/23/2013 | CN102887022A Dustproof eraser |
| 01/23/2013 | CN102887021A 便携黑板擦 Portable eraser |
| 01/23/2013 | CN102887020A Waterproof and cold-proof eraser |
| 01/16/2013 | CN202669326U Novel mechanical pencil |
| 01/16/2013 | CN202669323U Multi-surface blackboard eraser with handle |
| 01/16/2013 | CN202669322U Dust collecting blackboard eraser |
| 01/16/2013 | CN202669321U Novel dustproof blackboard eraser |
| 01/16/2013 | CN202669320U Multifunctional chalk eraser |
| 01/16/2013 | CN202669319U Sponge board eraser |
| 01/16/2013 | CN202669318U Eraser |
| 01/16/2013 | CN202669317U Stretchable blackboard eraser |
| 01/16/2013 | CN202669297U Blackboard with cleaning device |
| 01/16/2013 | CN202669296U Automatic water-wiping blackboard |
| 01/16/2013 | CN202669294U Blackboard capable of collecting chalk dust |
| 01/16/2013 | CN202667227U Water-solubility chalk dust absorbing device |
| 01/16/2013 | CN102874023A Pinhole type dust collecting blackboard eraser |
| 01/09/2013 | CN202656744U Full-automatic blackboard eraser |
| 01/09/2013 | CN202656743U Blackboard eraser with fan |
| 01/09/2013 | CN202656742U Dust absorption blackboard eraser |
| 01/09/2013 | CN202656741U Dry and wet dual-purpose blackboard eraser |
| 01/09/2013 | CN202656740U Blackboard eraser with universal serial bus (USB) flash disk sleeve |
| 01/09/2013 | CN202656717U Blackboard facilitating dust removal |
| 01/09/2013 | CN102862428A Hanging type blackboard eraser |
| 01/09/2013 | CN102862427A Labor-saving sucker type blackboard eraser |
| 01/02/2013 | CN202641192U Teaching tablet with sound amplification function and automatic cleaning function |
| 01/02/2013 | CN202641191U Teaching tablet with placing table and auto-cleaning function |
| 01/02/2013 | CN202641190U Teaching writing board with automatic cleaning function |
| 01/02/2013 | CN202641189U Electric blackboard eraser |
| 01/02/2013 | CN202641188U Telescopic blackboard eraser |
| 01/02/2013 | CN202641187U Blackboard eraser capable of automatically absorbing dust |
| 01/02/2013 | CN202641186U Dustproof blackboard eraser |
| 01/02/2013 | CN202641185U Dustproof blackboard eraser |
| 01/02/2013 | CN202641184U Electric blackboard eraser |
| 01/02/2013 | CN202641183U Electrostatic dedusting blackboard eraser |
| 01/02/2013 | CN202641182U Dustproof blackboard eraser |
| 01/02/2013 | CN202641181U Dust-absorption blackboard eraser |
| 01/02/2013 | CN202641180U Dust absorption blackboard eraser |
| 01/02/2013 | CN202641179U Moisturized blackboard brush |
| 01/02/2013 | CN202641178U Modified blackboard eraser |
| 01/02/2013 | CN202641177U Blackboard eraser capable of storing chalk |
| 01/02/2013 | CN202641176U Novel dry-wet eraser |
| 01/02/2013 | CN202641151U Novel blackboard chalk box set |
| 01/02/2013 | CN202641144U Novel dust-free blackboard |
| 01/02/2013 | CN202641103U Chalk writing isolation sleeve for teaching |
| 01/02/2013 | CN102848829A Split-type water absorbing blackboard eraser |
| 01/02/2013 | CN102848828A Blackboard eraser |
| 01/02/2013 | CN102848827A 黑板擦 Eraser |
| 01/02/2013 | CN102848826A Blackboard eraser |
| 12/2012 | |
| 12/26/2012 | CN202623756U Eraser shelf for holding ecological ink pen and word elimination eraser |
| 12/26/2012 | CN202623737U Blackboard eraser with chalk box |
| 12/26/2012 | CN202623736U Device for erasing words on blackboard |
| 12/26/2012 | CN202623735U 黑板擦拭器 Blackboard wiper |
| 12/26/2012 | CN202623734U Novel blackboard |
| 12/26/2012 | CN202623733U Novel ash-free blackboard eraser |
| 12/26/2012 | CN202623732U Dustproof blackboard eraser |
| 12/26/2012 | CN202623731U Electric dust collection blackboard eraser |
| 12/26/2012 | CN202623730U Dust-free blackboard eraser |
| 12/26/2012 | CN202623729U 多功能粉笔擦 Multifunctional chalk rub |
| 12/26/2012 | CN202623728U Remotely operated dust-free blackboard eraser |
| 12/26/2012 | CN202623727U Dust absorption blackboard eraser |
| 12/26/2012 | CN202623726U Novel blackboard |
| 12/26/2012 | CN202623725U Novel blackboard eraser |
| 12/26/2012 | CN202623724U Eraser capable of eliminating characters |
| 12/26/2012 | CN202623723U Music blackboard eraser |
| 12/26/2012 | CN202623722U Blackboard eraser with time table |
| 12/26/2012 | CN202623683U Novel blackboard |
| 12/26/2012 | CN202623682U Blackboard |
| 12/26/2012 | CN202623681U Blackboard |
| 12/26/2012 | CN202623680U Novel blackboard |
| 12/19/2012 | CN202608378U Storage type blackboard eraser |
| 12/19/2012 | CN202608377U Dust absorption blackboard eraser |
| 12/19/2012 | CN202608376U Dust-collecting chalk eraser for English teaching |
| 12/19/2012 | CN202608375U Blackboard eraser capable of remaking chalks |
| 12/19/2012 | CN202608374U Dust collective blackboard eraser |
| 12/19/2012 | CN202608373U Dust collection blackboard eraser |
| 12/19/2012 | CN202608372U Turbo-type motor-driven dust-collection blackboard eraser |
| 12/19/2012 | CN202608371U Dustless blackboard eraser |
| 12/19/2012 | CN202608370U Teaching blackboard for arts |
| 12/19/2012 | CN202608369U Dedusting blackboard eraser |
| 12/19/2012 | CN202608368U Group of mechanical blackboard erasers capable of sliding along parallel guide rods |
| 12/19/2012 | CN202608367U Multi-purpose blackboard eraser |
| 12/19/2012 | CN202608344U Dustless blackboard for English teaching |
| 12/19/2012 | CN202608340U Automatic cleaning blackboard |
| 12/19/2012 | CN102825959A Dust-absorption type blackboard eraser |