| Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409) | |
|---|---|
| 05/2009 | |
| 05/13/2009 | CN201235682Y Novel roller type environment friendly blackboard |
| 05/13/2009 | CN201235680Y Double-layer blackboard convenient to wipe |
| 05/13/2009 | CN201235670Y Multifunctional chalk jacket |
| 05/13/2009 | CN101428520A Environment friendly blackboard brush |
| 05/06/2009 | CN201231630Y Simple blackboard eraser |
| 05/06/2009 | CN201231625Y Blackboard capable of automatic clearing chalk dust |
| 05/06/2009 | CN201231624Y Easy-cleaning blackboard groove |
| 05/06/2009 | CN201231623Y Environment-protecting blackboard |
| 04/2009 | |
| 04/29/2009 | CN201227924Y Manual dust-absorbing blackboard eraser |
| 04/29/2009 | CN201227923Y Dustless blackboard |
| 04/29/2009 | CN201227922Y Blackboard eraser convenient to clean |
| 04/29/2009 | CN201227921Y Multifunctional blackboard eraser |
| 04/29/2009 | CN101417575A Environment-friendly dust-proof eraser |
| 04/29/2009 | CN101417574A Improved blackboard |
| 04/29/2009 | CN101417573A Dust-less blackboard |
| 04/29/2009 | CN101417572A Magnetic chalk |
| 04/22/2009 | CN201224282Y Novel blackboard eraser |
| 04/22/2009 | CN201224281Y Dust-absorbing blackboard eraser apparatus |
| 04/22/2009 | CN201224280Y Blackboard eraser |
| 04/22/2009 | CN201224279Y Blackboard eraser |
| 04/22/2009 | CN201224264Y Multifunctional blackboard cleaning tool |
| 04/22/2009 | CN201223864Y Blackboard eraser dust remover |
| 04/15/2009 | CN201220559Y Electric dust-absorbing blackboard eraser |
| 04/15/2009 | CN201220558Y Blackboard eraser |
| 04/15/2009 | CN201220557Y Full automatic electric blackboard eraser capable of wiping itinerantly |
| 04/15/2009 | CN201220556Y Novel white board brush |
| 04/15/2009 | CN201220555Y Water storage type blackboard eraser |
| 04/15/2009 | CN201220554Y Multifunctional blackboard eraser |
| 04/15/2009 | CN201220538Y Novel windshield wiper type blackboard |
| 04/08/2009 | CN201217347Y Blackboard eraser |
| 04/08/2009 | CN201217346Y Electric and dust-absorbing blackboard eraser |
| 04/08/2009 | CN201217345Y Scraps storing blackboard eraser |
| 04/08/2009 | CN201217344Y Chalk eraser |
| 04/08/2009 | CN201217343Y Environment-friendly dust-proof eraser |
| 04/08/2009 | CN201217342Y Environment-friendly non-dust self-cleaning blackboard eraser |
| 04/08/2009 | CN201217341Y Device for wiping blackboard |
| 04/08/2009 | CN201217340Y Blackboard eraser capable of removing chalk powder by itself |
| 04/08/2009 | CN201217332Y Dust absorption blackboard |
| 04/01/2009 | CN201214350Y Energy source-free automatic dust-absorption eraser |
| 04/01/2009 | CN201214349Y Healthy eraser |
| 04/01/2009 | CN201214343Y Blackboard with double layer brushes |
| 04/01/2009 | CN101396943A Multipurpose blackboard eraser |
| 03/2009 | |
| 03/25/2009 | CN201211804Y Chalk dust removal machine for blackboard eraser |
| 03/25/2009 | CN201211803Y Blackboard eraser |
| 03/25/2009 | CN201211802Y Chalk dust absorbing blackboard eraser |
| 03/25/2009 | CN201211801Y Combined blackboard eraser |
| 03/25/2009 | CN201211800Y Dual-purpose eraser |
| 03/25/2009 | CN201211791Y Blackboard |
| 03/25/2009 | CN201211787Y Whiteboard |
| 03/25/2009 | CN201211786Y Whiteboard |
| 03/18/2009 | CN201208860Y Cleaner for blackboard chalk dust |
| 03/18/2009 | CN201208859Y Clean blackboard eraser |
| 03/18/2009 | CN201208601Y Powder-removing box for blackboard eraser |
| 03/18/2009 | CN101386244A Dust absorption device |
| 03/11/2009 | CN201205831Y Blackboard eraser capable of absorbing chalk dust |
| 03/11/2009 | CN201205830Y Dustless eraser |
| 03/11/2009 | CN201205829Y Blackboard eraser |
| 03/11/2009 | CN201205828Y Blackboard eraser |
| 03/11/2009 | CN201205823Y Multifunctional blackboard |
| 03/04/2009 | CN201201457Y Dustfree environment-protective automatic eraser |
| 03/04/2009 | CN201201456Y Electrostatic type blackboard eraser |
| 03/04/2009 | CN201201455Y Absorbent blackboard eraser |
| 03/04/2009 | CN201201454Y Negative pressure absorbent blackboard eraser |
| 03/04/2009 | CN201201453Y Full automatic blackboard eraser |
| 03/04/2009 | CN201201452Y Absorbent blackboard eraser |
| 03/04/2009 | CN201201451Y Blackboard eraser |
| 03/04/2009 | CN201201450Y Automatic dustless blackboard cleaning device |
| 03/04/2009 | CN101376314A Multifunctional blackboard eraser |
| 02/2009 | |
| 02/25/2009 | CN201198253Y Dustproof dust removing blackboard eraser |
| 02/18/2009 | CN201195458Y Anticentripetal powder-collection twin-tub dust-suction plate wiping device |
| 02/18/2009 | CN201195457Y Electrostatic absorption type blackboard eraser |
| 02/18/2009 | CN201195456Y Blackboard eraser |
| 02/18/2009 | CN201195455Y Multifunctional blackboard eraser |
| 02/18/2009 | CN201195454Y Blackboard eraser with electronic music |
| 02/18/2009 | CN201195449Y Chalk dust groove easy to clean |
| 02/18/2009 | CN201195448Y Water channel for blackboard |
| 02/18/2009 | CN101367309A Negative-pressure dust-less blackboard |
| 02/18/2009 | CN101367308A Multifunctional environment friendly blackboard |
| 02/11/2009 | CN201192962Y Dust-less blackboard wiper |
| 02/11/2009 | CN201192961Y Blackboard eraser using cleaning fluid to erase writing |
| 02/11/2009 | CN201192958Y Blackboard |
| 02/04/2009 | CN201189789Y Electric blackboard eraser with adjustable length |
| 02/04/2009 | CN201189788Y Dust absorbing device for blackboard |
| 02/04/2009 | CN201189787Y Automatic wiping machine of blackboard for teaching |
| 02/04/2009 | CN201189783Y Dust absorpting blackboard |
| 02/04/2009 | CN101357559A Dust absorption blackboard eraser |
| 02/04/2009 | CN101357558A Dust-proof blackboard eraser |
| 01/2009 | |
| 01/28/2009 | CN201186568Y Hand-protective blackboard eraser |
| 01/28/2009 | CN201186567Y Novel dust eliminating blackboard eraser |
| 01/28/2009 | CN201186566Y Electric dust-free black-board eraser |
| 01/28/2009 | CN201186565Y Blackboard eraser with dust-separation plate |
| 01/28/2009 | CN201186564Y Blackboard eraser for student |
| 01/28/2009 | CN201186556Y Chalk eraser |
| 01/21/2009 | CN201183422Y Blackboard eraser with magnet block |
| 01/21/2009 | CN201183421Y Novel electric blackboard wiper |
| 01/21/2009 | CN201183420Y Multifunctional blackboard eraser |
| 01/21/2009 | CN201183406Y Blackboard |
| 01/14/2009 | CN201179805Y Chalk dust absorbing blackboard eraser |
| 01/14/2009 | CN201179804Y Dust absorbing blackboard eraser |
| 01/14/2009 | CN201179803Y Dustless rolling blackboard |