Patents
Sitemap › B43 - Writing or drawing implements; Bureau accessories › B43L - Articles for writing or drawing upon; Accessories for writing or drawing › B43L 21 - Blackboard or slate-cleaning devices
Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409)
01/2009
01/14/2009CN201179789Y Economic exercise book
01/07/2009CN201176087Y Novel blackboard wiper
01/07/2009CN201176086Y Electric dust-absorbing blackboard eraser
01/07/2009CN201176085Y Multifunction blackboard eraser
01/07/2009CN201176084Y Multifunction blackboard eraser
01/07/2009CN201176080Y Blackboard convenient for cleaning
01/07/2009CN201176079Y Multifunctional blackboard
01/07/2009CN100448697C Turn-over type blackboard
12/2008
12/31/2008CN201172347Y Dust absorbing device for blackboard
12/31/2008CN201172346Y Water type dust absorbing blackboard eraser
12/31/2008CN201172345Y Dust absorbing blackboard eraser
12/31/2008CN201172344Y Low-dust blackboard eraser
12/31/2008CN201172343Y Easy-cleaning blackboard eraser
12/31/2008CN201172342Y Dust absorbing blackboard eraser
12/31/2008CN201172341Y Multifunction blackboard eraser
12/31/2008CN201172335Y Environment-protecting blackboard
12/31/2008CN101332736A Contraction dust absorbing eraser
12/31/2008CN101332734A Blackboard capable automatically cleaning
12/24/2008CN201169174Y Absorbent blackboard eraser
12/24/2008CN201169173Y Dustfree wet erasing whiteboard eraser
12/24/2008CN201169172Y Board eraser
12/24/2008CN201169171Y Portable blackboard eraser
12/24/2008CN201169170Y Line drawing eraser
12/17/2008CN201165150Y Full-automatic blackboard eraser
12/17/2008CN201165149Y Chalk-dust absorbing type eraser
12/17/2008CN201165148Y Chalk dust absorbing blackboard eraser
12/17/2008CN201165147Y Mirror face blackboard eraser
12/17/2008CN201165132Y Electric blackboard
12/17/2008CN101323227A Ash-collecting blackboard eraser
12/10/2008CN201161516Y Skidproof blackboard eraser
12/10/2008CN201161515Y Automatic brush and suction device for black board
12/10/2008CN201161514Y White plate cleaning brush
12/10/2008CN201161513Y Convenient blackboard eraser
12/10/2008CN101318432A Energy source-free automatic dust-absorption eraser
12/03/2008CN201158251Y Multifunctional blackboard
11/2008
11/26/2008CN201154635Y Dust absorption blackboard eraser
11/26/2008CN201154634Y Multifunction blackboard eraser
11/26/2008CN201154633Y Dust absorption blackboard eraser
11/26/2008CN201154632Y Simple multilayer blackboard eraser
11/26/2008CN201154631Y White board eraser
11/26/2008CN101311003A Ash-collecting blackboard eraser
11/26/2008CN100436161C Writing assembly in combination with an eraser assembly
11/19/2008CN201151309Y Chock-dust absorbing wiper for blackboard
11/19/2008CN201151308Y Blackboard eraser with removable brushing
11/19/2008CN201151307Y Spray blackboard eraser
11/19/2008CN201151306Y Sweeper for chalk dust in groove of blackboard
11/19/2008CN201151305Y Cleaning brush for blackboard
11/12/2008CN201148085Y Multifunctional blackboard eraser
11/12/2008CN201148084Y Palm bark blackboard eraser
11/12/2008CN201148083Y Absorbent blackboard eraser
11/12/2008CN201148082Y Absorbent blackboard eraser
11/12/2008CN201148081Y Automatic dust-removing blackboard eraser apparatus
11/12/2008CN201148080Y Full-automatic blackboard duster
11/12/2008CN201148065Y Multifunctional blackboard
11/12/2008CN201148064Y Coloured blackboard and matched appliances thereof
11/06/2008DE202008007370U1 Schultafelwisch/Trockenvorrichtung School board wiping / drying machine
11/05/2008CN201143863Y Multipurpose movable blackboard eraser
11/05/2008CN201143862Y Healthy blackboard eraser
11/05/2008CN201143861Y Blackboard eraser
11/05/2008CN201143860Y Blackboard eraser
11/05/2008CN201143859Y Absorbent blackboard eraser
11/05/2008CN201143858Y Electric blackboard eraser
11/05/2008CN201143857Y Dustless blackboard eraser
11/05/2008CN201143856Y Multipurpose blackboard eraser
11/05/2008CN201143855Y Multifunctional blackboard eraser
11/05/2008CN201143854Y Big blackboard eraser
11/05/2008CN201143853Y Blackboard eraser with rail
11/05/2008CN201143852Y Absorbent blackboard eraser
11/05/2008CN201143843Y Novel blackboard
11/05/2008CN201143000Y Chalk Case
10/2008
10/29/2008CN201140637Y Dust-collecting eraser
10/29/2008CN201140636Y Dustfree electric blackboard eraser
10/29/2008CN201140635Y Green blackboard eraser
10/29/2008CN201140634Y Convenient blackboard eraser
10/29/2008CN201140633Y Chalk box with blackboard eraser blackboard eraser with chalk box
10/29/2008CN201140621Y Full-automatic wiping blackboard
10/29/2008CN201140620Y Blackboard
10/29/2008CN101293456A Powder brushing machine for automatic dustless blackboard
10/29/2008CN101293455A Multi-brush type blackboard eraser apparatus
10/22/2008CN201136398Y Multifunctional blackboard wiper for children
10/22/2008CN201136397Y Dust absorbing blackboard wiper
10/22/2008CN201136396Y Arm-adding, dust-sucking and two-sided blackboard wiper
10/22/2008CN201136395Y Blackboard wiper
10/22/2008CN201136394Y Novel blackboard wiper
10/22/2008CN201136384Y Electric cleaning and dust free blackboard without use of chalk and without in high position
10/22/2008CN100427327C Concentratively controlled multimedia teaching system
10/15/2008CN201132457Y Electric chalk dust absorbing blackboard eraser
10/15/2008CN201132456Y Blackboard eraser with replaceable brush
10/15/2008CN201132455Y Novel blackboard wiper
10/15/2008CN201132450Y Novel blackboard
10/08/2008CN201128335Y Dust-proof blackboard eraser
10/08/2008CN201128334Y Multifunctional electric blackboard eraser
10/08/2008CN201128333Y Multifunctional blackboard eraser
10/08/2008CN201128332Y Deformable blackboard eraser
10/08/2008CN201128331Y Electric blackboard eraser
10/08/2008CN201128330Y Convenient blackboard eraser
10/01/2008CN201124705Y Blackboard eraser
10/01/2008CN201124704Y Multifunctional blackboard eraser
10/01/2008CN201124703Y Hand-held type electric blackboard eraser
10/01/2008CN201124702Y Dust-absorbing blackboard eraser
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