| Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409) | |
|---|---|
| 06/2008 | |
| 06/18/2008 | CN201073880Y Environment protective blackboard eraser |
| 06/18/2008 | CN201073879Y Dust-proof blackboard eraser |
| 06/18/2008 | CN201073878Y Dust-collecting type blackboard eraser for schools |
| 06/18/2008 | CN201073872Y Annular-back ash wiping blackboard |
| 06/11/2008 | CN201070945Y Blackboard eraser |
| 06/11/2008 | CN201070944Y Absorbent blackboard eraser |
| 06/11/2008 | CN201070943Y Water spraying/water dipping blackboard eraser |
| 06/11/2008 | CN201070942Y Blackboard eraser |
| 06/11/2008 | CN201070941Y Blackboard eraser |
| 06/11/2008 | CN201070940Y Blackboard eraser |
| 06/04/2008 | CN201068048Y Dust-absorbing blackboard eraser |
| 06/04/2008 | CN201068047Y Dust-removing blackboard eraser |
| 06/04/2008 | CN201068046Y Blackboard eraser |
| 06/04/2008 | CN201068045Y Car type dust-free blackboard eraser |
| 06/04/2008 | CN201068044Y Environmental protection two-side eraser |
| 06/04/2008 | CN101190631A Dust removing blackboard |
| 06/04/2008 | CN101190630A Blackboard capable of automatically wiping blackboard |
| 05/2008 | |
| 05/28/2008 | CN201065019Y Environmental protection blackboard eraser |
| 05/28/2008 | CN201065018Y Multifunctional blackboard eraser |
| 05/28/2008 | CN201065017Y Blackboard eraser with magnet |
| 05/28/2008 | CN201065016Y Water dipping board wiper box |
| 05/28/2008 | CN201065007Y Novel blackboard |
| 05/21/2008 | CN201061969Y Dust-free chalk eraser |
| 05/21/2008 | CN201061968Y Electric blackboard eraser |
| 05/21/2008 | CN201061967Y Dust-collection blackboard brush |
| 05/21/2008 | CN201061964Y Multifunctional combined teaching aids |
| 05/14/2008 | CN201058548Y Blackboard eraser |
| 05/14/2008 | CN101177095A Dustproof blackboard eraser |
| 05/14/2008 | CN101177094A Blackboard eraser |
| 05/07/2008 | CN101172441A Blackboard with automatic writing erasure |
| 04/2008 | |
| 04/30/2008 | CN101168338A Lamination blackboard |
| 04/16/2008 | CN201046852Y Multifunctional water lifting rod |
| 04/16/2008 | CN201046643Y Balloon type dust-absorbing blackboard eraser |
| 04/16/2008 | CN101161471A A blackboard with double wiping strips |
| 04/09/2008 | CN101157315A Automatic blackboard cleaning machine |
| 04/02/2008 | CN201042894Y Telecontrol full-automatic blackboard cleaning machine |
| 03/2008 | |
| 03/26/2008 | CN201040457Y Automatic panel wiping arrangement with two-dimensional control |
| 03/19/2008 | CN201036952Y Electric controlled type multi-function blackboard |
| 03/19/2008 | CN101143537A Mobile blackboard with erasing and brushing tools |
| 03/12/2008 | CN201033513Y Multipurpose blackboard eraser |
| 03/05/2008 | CN201030744Y Rapid answering device |
| 03/05/2008 | CN201030361Y Panel cleaning device |
| 03/05/2008 | CN101134418A Free fall dustless simple blackboard eraser |
| 02/2008 | |
| 02/27/2008 | CN201026760Y Eraser head for absorbing dust |
| 02/27/2008 | CN201026759Y Blackboard eraser with permutable eraser core |
| 02/27/2008 | CN201026758Y Blackboard eraser |
| 02/20/2008 | CN201023378Y Automatic dust-collecting blackboard eraser |
| 02/20/2008 | CN201023375Y Shaking cleaning type blackboard |
| 02/20/2008 | CN101125506A Dust-free blackboard eraser |
| 02/20/2008 | CN101125504A Electric blackboard |
| 02/13/2008 | CN201021032Y Blackboard eraser for teaching |
| 02/13/2008 | CN201021031Y Automatic dust-collection blackboard eraser |
| 02/13/2008 | CN201021030Y Dust-absorbing blackboard eraser |
| 02/13/2008 | CN201021029Y Environment-friendly blackboard eraser |
| 02/13/2008 | CN201021028Y Automatic blackboard wiper device |
| 02/13/2008 | CN201021027Y Double surface self-cleaning blackboard eraser |
| 02/13/2008 | CN201021016Y Multifunctional teaching writing demonstration board |
| 02/13/2008 | CN100368209C Ultra-fine fiber blackboard eraser |
| 02/06/2008 | CN201015940Y Automatic dust-absorption blackboard eraser machine |
| 01/2008 | |
| 01/30/2008 | CN201012600Y Dustless blackboard |
| 01/30/2008 | CN201012599Y Blackboard eraser |
| 01/30/2008 | CN201012598Y Health blackboard eraser |
| 01/23/2008 | CN201009608Y Telescopic blackboard eraser |
| 01/23/2008 | CN201009607Y Intellectual electric chalk eraser |
| 01/23/2008 | CN201009606Y Manual multipurpose eraser for absorbing chalk dust |
| 01/23/2008 | CN201009605Y Dustproof housing for blackboard eraser |
| 01/23/2008 | CN201009584Y Mobile blackboard with brush tool |
| 01/23/2008 | CN201009564Y Chalk clip |
| 01/16/2008 | CN201006670Y Absorbent blackboard eraser |
| 01/16/2008 | CN201006669Y Chock-dust absorbing wiper for blackboard |
| 01/09/2008 | CN201002460Y Telescopic blackboard eraser |
| 01/09/2008 | CN201002459Y Multifunctional blackboard eraser |
| 01/09/2008 | CN201002458Y Dust-suction blackboard eraser |
| 01/09/2008 | CN201002457Y Magnetic blackboard eraser |
| 01/09/2008 | CN201002456Y Blackboard eraser capable of changing wiping core |
| 01/09/2008 | CN201002446Y Dustless blackboard |
| 01/02/2008 | CN200998973Y Electric dust-absorbing blackboard eraser |
| 01/02/2008 | CN200998972Y Electric magnetic blackboard eraser |
| 01/02/2008 | CN200998964Y Flexible blackboard |
| 01/02/2008 | CN101096165A Dust-absorbing blackboard eraser |
| 12/2007 | |
| 12/26/2007 | CN200995569Y Vacuum dust-collecting blackboard sponge |
| 12/26/2007 | CN200995568Y Dust-collecting blackboard sponge |
| 12/26/2007 | CN200995567Y Dust-collecting blackboard sponge |
| 12/26/2007 | CN200995566Y Dust-collecting blackboard sponge |
| 12/26/2007 | CN200995565Y Dust-collecting blackboard sponge |
| 12/26/2007 | CN200995553Y Environmental-protecting and self-erasing teaching blackboard with electric flexible side |
| 12/26/2007 | CN101092097A Blackboard eraser capable of sucking chalk powder |
| 12/19/2007 | CN200992090Y Dust-collecting type blackboard eraser |
| 12/19/2007 | CN200992089Y Dust-collecting pen eraser |
| 12/19/2007 | CN200992088Y Electric dust-collecting type blackboard eraser |
| 12/19/2007 | CN200992087Y Blackboard eraser with function of recepting chalk dust |
| 12/19/2007 | CN200992086Y Device for preventing chalk dust while erasing blackboard |
| 12/19/2007 | CN200992085Y Multifunction blackboard eraser |
| 12/19/2007 | CN200992074Y Multifunction blackboard |
| 12/19/2007 | CN200992073Y Self-erasing tpe blackboard |
| 12/19/2007 | CN200992069Y Self-erasing type blackboard |
| 12/19/2007 | CN200990978Y Telescopic brush |
| 12/13/2007 | WO2007142378A1 Remote-controlled electromotive eraser for a blackboard |
| 12/12/2007 | CN200988381Y Dust suction plate erasing machine |
| 12/12/2007 | CN200988380Y Blackboard eraser |