| Patents for B43L 21 - Blackboard or slate-cleaning devices (5,409) |
|---|
| 06/27/2007 | CN2915541Y Automatic teaching device for writing on blackborad |
| 06/20/2007 | CN2913044Y Dust-proof blackboard eraser |
| 06/20/2007 | CN2913043Y Highly effective blackboard eraser |
| 06/13/2007 | CN2910631Y Combination, multi-functional black-board eraser |
| 06/13/2007 | CN2910630Y Black-board eraser with water |
| 06/13/2007 | CN2910627Y Automatic, multi-medium, dust-free lecture board with black, white and green color |
| 06/06/2007 | CN2908193Y 黑板擦 Eraser |
| 06/06/2007 | CN2908192Y Dust collecting device for eraser |
| 06/06/2007 | CN2908191Y Blackboard eraser cover |
| 05/30/2007 | CN2905490Y Pollution-proof eraser |
| 05/30/2007 | CN2905489Y Blackboard wiper |
| 05/30/2007 | CN2905488Y Combined type eraser |
| 05/30/2007 | CN2905487Y Intelligent dust-proof teaching black-white board wiper |
| 05/30/2007 | CN2905473Y Dustless blackboard |
| 05/23/2007 | CN2902756Y Dustless environmental protection blackboard brush |
| 05/23/2007 | CN2902755Y Electrostatic dust collecting blackboard eraser |
| 05/23/2007 | CN2902754Y Electric dust collecting blackboard eraser |
| 05/23/2007 | CN2902753Y 负压式黑板擦 Negative pressure eraser |
| 05/23/2007 | CN2902752Y Double face blackboard eraser |
| 05/23/2007 | CN1966282A Turn-over type blackboard |
| 05/16/2007 | CN2900192Y Easy changing blackboard eraser |
| 05/09/2007 | CN2897679Y Automatic blackboard with water eraser |
| 05/02/2007 | CN2895099Y Hand type blackboard eraser |
| 05/02/2007 | CN2895098Y Automatic-cleaning blackboard eraser |
| 05/02/2007 | CN2895090Y Rotary black board capable of automatically erasing chalk trace and prevent dust from being diffused |
| 05/02/2007 | CN2895089Y Fully-automatic blackboard |
| 05/02/2007 | CN2895087Y Automatic blackboard erasing device for upper-lower push-pull type blackboard |
| 04/25/2007 | CN2892504Y Magnetic drum brush |
| 04/25/2007 | CN2892503Y Blackboard eraser |
| 04/25/2007 | CN2892496Y Dustless blackboard |
| 04/25/2007 | CN2892495Y Electric turnable blackboard |
| 04/25/2007 | CN1951704A Dust-suction eraser |
| 04/24/2007 | US7207805 Encapsulated tray and end caps for a writing board |
| 04/18/2007 | CN2889739Y Dust-adsorption type environment-friendly eraser |
| 04/18/2007 | CN2889738Y Multi-functional blackboard |
| 04/18/2007 | CN2889737Y Non-dust automatic-wiping teaching board |
| 04/18/2007 | CN1948027A 黑板擦 Eraser |
| 04/11/2007 | CN2887616Y 黑板擦 Eraser |
| 04/11/2007 | CN2887615Y 黑板擦 Eraser |
| 04/04/2007 | CN2885606Y Adjustable length blackboard eraser |
| 04/04/2007 | CN2885605Y Transmission type automatic erasing blackboard device |
| 03/28/2007 | CN2883027Y Eraser |
| 03/28/2007 | CN2883026Y Handheld drying electric eraser |
| 03/28/2007 | CN2883025Y Dust collecting brush for blackboard |
| 03/28/2007 | CN2883022Y All-function blackboard able to longitudinal transfer |
| 03/21/2007 | CN2880537Y Eraser |
| 03/21/2007 | CN2880536Y Eraser with chalk dust absorbing device |
| 03/21/2007 | CN2880535Y Environment protecting eraser of self dust collecting |
| 03/21/2007 | CN2880534Y Multifunctional spraying eraser |
| 03/21/2007 | CN2880533Y Blackboard eraser |
| 03/21/2007 | CN2880525Y Dustless blackboard |
| 03/21/2007 | CN2880524Y Automatic erasing dustless blackboard |
| 03/21/2007 | CN2880523Y Automatic eraser |
| 03/21/2007 | CN2880522Y Remote control electric eraser |
| 03/21/2007 | CN1931602A Electric watered black board eraser |
| 03/14/2007 | CN2878091Y Non-powered self-dedusting blackboard eraser |
| 03/14/2007 | CN2878090Y Dual-purpose blackboard eraser |
| 03/14/2007 | CN2878089Y Environmental protection blackboard eraser |
| 03/14/2007 | CN2878082Y Blackboard with blackboard eraser |
| 03/07/2007 | CN2875843Y All direction environmental protection blackboard eraser |
| 03/07/2007 | CN2875842Y Intelligent blackboard word brushing machine |
| 03/07/2007 | CN2875841Y Blackboard eraser |
| 02/26/2007 | CA2556838A1 Microfiber chalkboard eraser |
| 02/21/2007 | CN2871234Y Dust-collecting blackboard eraser |
| 02/21/2007 | CN2871229Y Laminated blackboard |
| 02/21/2007 | CN2871228Y Blackboard with erasing function |
| 02/14/2007 | CN2868710Y Sliding-type blackboard |
| 02/07/2007 | CN2866187Y Combined blackboard eraser set |
| 02/07/2007 | CN2866179Y Full-automatic health care blackboard device |
| 01/31/2007 | CN2863505Y Dust-suction eraser |
| 01/31/2007 | CN2863504Y Electric chalk dust absorbing blackboard eraser |
| 01/31/2007 | CN2863503Y Blackboard eraser duster |
| 01/31/2007 | CN2863502Y Negative pressure type blackboard eraser dust collector |
| 01/31/2007 | CN2863501Y Inclined flow type electric dust-absorbing blackboard brush |
| 01/31/2007 | CN2863500Y Sanitation blackboard eraser |
| 01/31/2007 | CN2863499Y Multifunctional blackboard eraser |
| 01/25/2007 | CA2512414A1 Vacuum eraser for blackboards |
| 01/24/2007 | CN2860874Y Blackboard eraser |
| 01/24/2007 | CN2860873Y Blackboard eraser |
| 01/17/2007 | CN2858325Y Sanitary blackboard eraser with handle |
| 01/17/2007 | CN2858324Y Dust-absorbing blackboard eraser |
| 01/17/2007 | CN2858323Y Automatic device for wiping blackboard |
| 01/10/2007 | CN2855772Y Environmental protection type chalk-dust free black-board |
| 01/04/2007 | US20070000082 Skin care article |
| 01/03/2007 | CN2853444Y Eraser with support bar |
| 01/03/2007 | CN2853443Y Electric eraser |
| 01/03/2007 | CN2853442Y Eraser with miniature chalk dust absoring device |
| 01/03/2007 | CN2853441Y Eraser with sponge and water supplier |
| 01/03/2007 | CN2853440Y Eraser |
| 12/27/2006 | CN2850959Y Electric dust-absorbing blackboard eraser |
| 12/27/2006 | CN2850958Y 黑板擦 Eraser |
| 12/27/2006 | CN2850957Y Dust-free blackboard eraser |
| 12/27/2006 | CN2850956Y Chalk dust-removing cleaner |
| 12/27/2006 | CN2850945Y Multi-functional electric blackboard |
| 12/27/2006 | CN1883963A Vacuum dust collector for erasing blackboard and method therefor |
| 12/20/2006 | CN2848596Y Convenient blackboard eraser |
| 12/20/2006 | CN2848595Y Multifunction blackboard eraser |
| 12/13/2006 | CN2846158Y Electric driven dust suction blackboard eraser |
| 12/06/2006 | CN2843898Y Blackboard eraser |
| 12/06/2006 | CN2843897Y Blackboard |