| Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409) | |
|---|---|
| 02/2010 | |
| 02/17/2010 | CN201405642Y Blackboard eraser convenient for carrying and extracting chalk |
| 02/17/2010 | CN201405641Y Hand protecting blackboard eraser |
| 02/17/2010 | CN201405640Y Multifunction eraser |
| 02/17/2010 | CN201405629Y Combined type blackboard provided with chalk dust collecting device |
| 02/17/2010 | CN101648478A Strip blackboard eraser |
| 02/10/2010 | CN201400020Y Rolling dust-proof blackboard |
| 02/10/2010 | CN201400018Y Bi-directional alternate erasing type automatic blackboard |
| 02/10/2010 | CN201400016Y Multipurpose memo board |
| 02/10/2010 | CN101642995A Electric dust absorption blackboard eraser |
| 02/03/2010 | CN201395001Y Dustproof electric blackboard |
| 02/03/2010 | CN201395000Y Electric blackboard eraser |
| 02/03/2010 | CN201394995Y Automatic cleaning dust-free blackboard |
| 02/03/2010 | CN101638022A Simple automatic blackboard brush |
| 01/2010 | |
| 01/27/2010 | CN201390071Y Blackboard eraser with wristlet |
| 01/27/2010 | CN201390070Y Sawtooth multi-functional dust-absorption blackboard brush |
| 01/27/2010 | CN201390069Y Blackboard capable of automatically erasing chalk writings |
| 01/27/2010 | CN201390068Y Dust-suction blackboard eraser |
| 01/27/2010 | CN201390067Y Dust-suction chalkboard eraser |
| 01/27/2010 | CN201390053Y Erasable and writable chalk holder |
| 01/20/2010 | CN201385526Y Blackboard dustproof curtain |
| 01/20/2010 | CN201385525Y Automatic blackboard eraser |
| 01/20/2010 | CN201385524Y Dust suction blackboard eraser |
| 01/20/2010 | CN201385523Y Novel eraser |
| 01/20/2010 | CN201385509Y Novel electric dustless flexible blackboard |
| 01/13/2010 | CN201380696Y Dustless environment-friendly blackboard |
| 01/13/2010 | CN201380695Y Blackboard eraser |
| 01/13/2010 | CN201380694Y Blackboard eraser |
| 01/13/2010 | CN201380693Y Propelling pencil capable of preventing pencil lead from slipping |
| 01/13/2010 | CN201380668Y Novel dual-purpose chalk sleeve |
| 01/13/2010 | CN201379507Y Multipurpose telescoping brush |
| 01/06/2010 | CN201376438Y Electric blackboard eraser |
| 01/06/2010 | CN201376437Y Dust-collecting blackboard eraser |
| 01/06/2010 | CN201376436Y Multifunctional blackboard eraser |
| 01/06/2010 | CN201376435Y Novel blackboard eraser |
| 01/06/2010 | CN201376434Y Dual-purpose blackboard eraser |
| 01/06/2010 | CN201376433Y Blackboard eraser |
| 01/06/2010 | CN201376424Y Dust-free writing board |
| 01/06/2010 | CN201376423Y Wiping-free type environmental-protection blackboard |
| 01/06/2010 | CN100577445C Pneumatic blackboard eraser |
| 01/06/2010 | CN100577444C Multi-brush type blackboard eraser apparatus |
| 12/2009 | |
| 12/30/2009 | CN201371685Y Novel blackboard eraser |
| 12/30/2009 | CN201371684Y Glove-type blackboard eraser |
| 12/30/2009 | CN201371683Y Blackboard wiper capable of cleaning blackboard thoroughly |
| 12/30/2009 | CN201371682Y Semi-automatic blackboard erasing device |
| 12/30/2009 | CN101612856A Blackboard eraser |
| 12/23/2009 | CN201366889Y Chalk eraser capable of absorbing chalk dust |
| 12/23/2009 | CN201366888Y Automatic blackboard cleaning system |
| 12/23/2009 | CN201366887Y Magnetic sanitary blackboard eraser |
| 12/23/2009 | CN101607498A Palm-shaped scrubbing brush for teaching |
| 12/16/2009 | CN201362114Y Blackboard eraser capable of adjusting length |
| 12/16/2009 | CN201362113Y Blackboard chalk dust collection device |
| 12/16/2009 | CN201362112Y Convenient blackboard eraser |
| 12/16/2009 | CN201362111Y Multifunctional blackboard eraser |
| 12/16/2009 | CN201362110Y Withdrawable black board eraser capable of being washed |
| 12/16/2009 | CN201362100Y Convenient blackboard |
| 12/16/2009 | CN201362099Y Automatic blackboard |
| 12/16/2009 | CN201362098Y Improved blackboard |
| 12/16/2009 | CN201362097Y Automatically-wiping blackboard |
| 12/09/2009 | CN201357671Y Novel blackboard eraser |
| 12/09/2009 | CN201357670Y Blackboard eraser |
| 12/09/2009 | CN201357669Y Static dust-free blackboard eraser |
| 12/09/2009 | CN201357668Y Streamlined wet type rolling blackboard eraser |
| 12/09/2009 | CN201357661Y Automatic dust-removing blackboard |
| 12/09/2009 | CN201357660Y Blackboard equipped with full-automatic dust collection device |
| 12/09/2009 | CN201357659Y Blackboard capable of absorbing dust |
| 12/09/2009 | CN201357657Y Blackboard with clean blackboard eraser |
| 12/09/2009 | CN101596823A Blackboard eraser |
| 12/02/2009 | CN201353960Y Telescopic blackboard eraser |
| 12/02/2009 | CN201353950Y Dustless blackboard |
| 11/2009 | |
| 11/25/2009 | CN201352399Y Multifunctional ferule |
| 11/25/2009 | CN201350778Y Blackboard eraser |
| 11/25/2009 | CN201350777Y Dust-collecting blackboard eraser |
| 11/25/2009 | CN201350776Y Roller shaft blackboard eraser device |
| 11/25/2009 | CN201350775Y Chalk-dust suppression blackboard eraser |
| 11/25/2009 | CN201350774Y Environment-friendly blackboard eraser |
| 11/25/2009 | CN201350773Y Blackboard eraser for preventing dust from rising |
| 11/25/2009 | CN201350765Y Multi-function rolling-type dust-free blackboard |
| 11/25/2009 | CN101585283A Electric erasing type dustfree soft blackboard |
| 11/18/2009 | CN201346939Y Dust-sucking blackboard eraser |
| 11/18/2009 | CN201346938Y Portable blackboard eraser |
| 11/18/2009 | CN201346937Y Blackboard eraser and blackboard using same |
| 11/18/2009 | CN201346930Y Blackboard |
| 11/18/2009 | CN201346929Y Self-cleaning blackboard |
| 11/18/2009 | CN101579987A Electric dust collecting blackboard wiper |
| 11/11/2009 | CN201342889Y Dedusting blackboard eraser |
| 11/11/2009 | CN201342888Y Dust-absorbing blackboard eraser |
| 11/11/2009 | CN201342887Y Dustproof blackboard eraser |
| 11/11/2009 | CN201342886Y Dust collection blackboard eraser |
| 11/11/2009 | CN201342885Y Multifunctional dust-proof blackboard eraser |
| 11/11/2009 | CN201342884Y Pull-type blackboard eraser |
| 11/11/2009 | CN201342883Y Blackboard eraser |
| 11/11/2009 | CN201342873Y Blackboard with convenient eraser strip |
| 10/2009 | |
| 10/28/2009 | CN201333882Y Fully-automatic cleaning blackboard eraser |
| 10/28/2009 | CN101564961A Centrifugal chalk-collection double-bucket dust-catching blackboard eraser |
| 10/21/2009 | CN201329750Y Telescopic blackboard brush |
| 10/21/2009 | CN201329749Y Rolling type blackboard eraser |
| 10/21/2009 | CN201329748Y Novel blackboard eraser |
| 10/21/2009 | CN201329747Y Dual-face dust collecting blackboard eraser |
| 10/21/2009 | CN201329737Y Electric teaching blackboard |
| 10/21/2009 | CN201329363Y Blackboard eraser base |