| Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409) | |
|---|---|
| 03/2011 | |
| 03/23/2011 | CN201769540U Switch type blackboard capable of carrying out automatic erasure |
| 03/23/2011 | CN101987552A Automatic blackboard eraser |
| 03/16/2011 | CN201761242U Dust collection blackboard eraser |
| 03/16/2011 | CN201761241U Blackboard eraser |
| 03/16/2011 | CN201761240U Rechargeable dust absorbing eraser |
| 03/16/2011 | CN201761239U Manual power generation type blackboard eraser |
| 03/16/2011 | CN201761238U Recyclable environment-friendly blackboard eraser |
| 03/16/2011 | CN201761237U Blackboard eraser with reflector |
| 03/16/2011 | CN201761236U Dustproof blackboard eraser |
| 03/16/2011 | CN201761235U Double-purpose black board eraser |
| 03/16/2011 | CN201761213U Hygienic blackboard |
| 03/16/2011 | CN201761210U Blackboard slot |
| 03/16/2011 | CN101564961B Centrifugal chalk-collection double-bucket dust-catching blackboard eraser |
| 03/09/2011 | CN201756008U Blackboard eraser with handle |
| 03/09/2011 | CN201756007U Drawing type magnetic blackboard eraser system |
| 03/09/2011 | CN201756006U Multipurpose white board brush |
| 03/09/2011 | CN201755995U Blackboard |
| 03/03/2011 | US20110052307 Two-in-one screen cleansing device |
| 03/02/2011 | CN201752981U Wiping-writing dual-purpose chalk sleeve |
| 02/2011 | |
| 02/23/2011 | CN201751208U Dust absorption blackboard eraser |
| 02/23/2011 | CN201751207U Blackboard eraser |
| 02/23/2011 | CN201751206U Dust absorption blackboard eraser |
| 02/23/2011 | CN201751205U Blackboard brush |
| 02/23/2011 | CN201751201U Rotary type blackboard |
| 02/16/2011 | CN201745345U Dust-removing blackboard eraser |
| 02/16/2011 | CN201745344U Dust-sucking-type blackboard eraser |
| 02/16/2011 | CN201745343U Chalk dust suction box |
| 02/16/2011 | CN201745342U Dust removal eraser |
| 02/16/2011 | CN201745341U Dust-collecting blackboard eraser |
| 02/16/2011 | CN201745340U Cleanliness-maintaining dustproof replaceable blackboard eraser |
| 02/16/2011 | CN201745339U Folding blackboard eraser |
| 02/16/2011 | CN201745323U Blackboard with cleaning device |
| 02/16/2011 | CN201745321U Dust-free blackboard |
| 02/09/2011 | CN201736685U Automatic blackboard cleaning device |
| 02/09/2011 | CN201736684U Electric blackboard brush with function of telescopic dust suction |
| 02/09/2011 | CN201736683U Blackboard eraser |
| 02/09/2011 | CN201736682U Dust collection blackboard eraser |
| 02/09/2011 | CN201736681U Electric dustless blackboard eraser |
| 02/09/2011 | CN201736680U Chalk dust brush |
| 02/09/2011 | CN201736679U Chalk brush |
| 02/09/2011 | CN201736678U Eraser with dust suction device |
| 02/09/2011 | CN201736677U Dust collection blackboard eraser |
| 02/09/2011 | CN201736676U Rail for accommodating chalk dust which can be easily removed from blackboard |
| 02/09/2011 | CN201736675U Electric dust absorbing type blackboard eraser |
| 02/09/2011 | CN201736674U Novel blackboard eraser |
| 02/09/2011 | CN201736673U Blackboard eraser |
| 02/09/2011 | CN201736672U Blackboard eraser |
| 02/09/2011 | CN201736641U Blackboard |
| 02/09/2011 | CN201736640U Blackboard |
| 02/09/2011 | CN201736639U Blackboard |
| 02/09/2011 | CN201736638U Blackboard with dust absorbing function |
| 02/09/2011 | CN201736637U Electric wiping type blackboard |
| 02/09/2011 | CN201736590U Automatic chalk |
| 02/09/2011 | CN201735552U Wiping device capable of adjusting wiping position |
| 02/09/2011 | CN101966788A Rechargeable tian-shaped blackboard eraser |
| 02/02/2011 | CN201729009U Blackboard brush |
| 02/02/2011 | CN201729008U Chalk brush |
| 02/02/2011 | CN201729007U Dust absorbing blackboard eraser |
| 02/02/2011 | CN201729006U Glove type blackboard eraser |
| 02/02/2011 | CN201729005U Adsorption magnetic blackboard eraser |
| 02/02/2011 | CN201728983U Blackboard convenient to wipe |
| 02/02/2011 | CN201728982U Blackboard |
| 02/02/2011 | CN201728981U Blackboard |
| 02/02/2011 | CN201728980U Teaching blackboard |
| 02/02/2011 | CN201728947U Chalk case |
| 02/02/2011 | CN101961967A Automatic cleaning blackboard |
| 01/2011 | |
| 01/26/2011 | CN201721216U Handheld motor-driven blackboard eraser |
| 01/26/2011 | CN201721215U Blackboard eraser with dust accumulating box |
| 01/26/2011 | CN201721214U Blackboard eraser |
| 01/26/2011 | CN201721197U Novel electric blackboard |
| 01/26/2011 | CN201721196U Multifunctional white board |
| 01/25/2011 | CA2548257C Pre-moistened eraser and cleaner for white board |
| 01/19/2011 | CN201712374U Blackboard eraser |
| 01/19/2011 | CN201712373U Blackboard eraser with dust catcher |
| 01/19/2011 | CN201712372U Dustless blackboard brush |
| 01/19/2011 | CN201712371U Dustless blackboard eraser |
| 01/19/2011 | CN201712370U Blackboard wiper |
| 01/19/2011 | CN201712369U Magnetic blackboard eraser |
| 01/19/2011 | CN201712368U Multifunctional blackboard eraser |
| 01/19/2011 | CN201712367U Multifunctional magnetic blackboard |
| 01/19/2011 | CN201712366U Telescopic blackboard eraser |
| 01/19/2011 | CN201712365U Dust-proof blackboard eraser |
| 01/19/2011 | CN201712340U Improved blackboard |
| 01/12/2011 | CN201703146U Cleaning support |
| 01/12/2011 | CN201703145U Convenient blackboard eraser |
| 01/12/2011 | CN201703144U Dust absorbing blackboard eraser |
| 01/12/2011 | CN201703143U Dust-proof eraser |
| 01/12/2011 | CN201703142U Centrifugal muffling multi-filter-layer powder suction board erasing machine |
| 01/12/2011 | CN201703141U Blackboard eraser with sliding type teaching aid containing box |
| 01/12/2011 | CN201703140U Glove-type blackboard eraser |
| 01/12/2011 | CN201703139U Telescopic blackboard eraser |
| 01/05/2011 | CN201693942U 黑板擦 Eraser |
| 01/05/2011 | CN201693941U Dust collecting blackboard eraser |
| 01/05/2011 | CN201693940U Cleaning blackboard eraser |
| 01/05/2011 | CN201693939U Electric telescopic dust-free chalk eraser |
| 01/05/2011 | CN201693938U Blackboard eraser with suction cup |
| 01/05/2011 | CN201693937U Electric blackboard eraser |
| 01/05/2011 | CN201693936U Rolling blackboard eraser |
| 01/05/2011 | CN201693935U Novel blackboard eraser |
| 01/05/2011 | CN201693934U Blackboard eraser |