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with means for absorbing the chalk dust

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  • CPC
  • B43L21/02
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Parent Industries

BPERFORMING OPERATIONS TRANSPORTING B43Writing accessories B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING B43L21/00Blackboard or slate cleaning devices

Current Industry

B43L21/02with means for absorbing the chalk dust
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Apparatus erasing blackboard through areas
    • Patent number 8,375,505
    • Issue date Feb 19, 2013
    • National Central University
    • Shu-San Hsiau
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Eraser for blackboard
    • Patent number 7,921,501
    • Issue date Apr 12, 2011
    • Ming-Feng Yu
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Vacuum eraser for blackboards
    • Patent number 7,685,672
    • Issue date Mar 30, 2010
    • Hsi-Hur Lai
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Chalk-dust collecting apparatus for blackboard eraser
    • Patent number 7,448,112
    • Issue date Nov 11, 2008
    • Global Metal Supplier Corp.
    • Po-Cheng Li
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Chalkboard cleaning apparatus with a fluid reservoir
    • Patent number 6,944,904
    • Issue date Sep 20, 2005
    • Gaylord A Williams
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Blackboard eraser
    • Patent number 6,895,627
    • Issue date May 24, 2005
    • Chieh-Jen Lin
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Eraser having selectively openable and closable aperatures
    • Patent number 6,772,472
    • Issue date Aug 10, 2004
    • Yu Long Wang
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Dust collect device for an eraser
    • Patent number 6,330,732
    • Issue date Dec 18, 2001
    • Te-Hsi Liu
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Automatic erasing device for erasing chalk marks on a writing board...
    • Patent number 6,266,841
    • Issue date Jul 31, 2001
    • Huey Yeau Co., LTD
    • Ming-Pao Cho
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Automatic erasing device for erasing chalk marks on a writing board
    • Patent number 6,073,297
    • Issue date Jun 13, 2000
    • Chun-Hsien Lee
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Electric board cleaner
    • Patent number 5,537,711
    • Issue date Jul 23, 1996
    • Yu-Che Tseng
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Apparatus for automatically brushing chalk powder off from a blackb...
    • Patent number 5,455,976
    • Issue date Oct 10, 1995
    • Kim; Eon S.
    • Se W. Kim
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Automatic chalk ash cleaner
    • Patent number 5,274,869
    • Issue date Jan 4, 1994
    • Ying-Tu Hung
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Automatic blackboard eraser apparatus
    • Patent number 5,216,776
    • Issue date Jun 8, 1993
    • Daniel C. Dennison
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Automatic chalk-powder collecting device for blackboard eraser
    • Patent number 4,941,225
    • Issue date Jul 17, 1990
    • Su-Land Liao
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Blackboard eraser
    • Patent number 4,742,594
    • Issue date May 10, 1988
    • Jin-Sheng Chen
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Automatic dust-removing eraser of a rolling-friction type for black...
    • Patent number 4,596,059
    • Issue date Jun 24, 1986
    • Wen-Chin Lee
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Cleaner and chalk dust receptacle for chalk board erasers
    • Patent number 4,549,327
    • Issue date Oct 29, 1985
    • Robert M. Johnson
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Blackboard eraser
    • Patent number 4,462,134
    • Issue date Jul 31, 1984
    • Jeng-Lin Wang
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Cleaners for chalk erasers
    • Patent number 4,099,286
    • Issue date Jul 11, 1978
    • Soji Ishikawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Chalk board eraser
    • Patent number 4,080,683
    • Issue date Mar 28, 1978
    • Chong Sun Yi
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Eraser with dust-collecting means
    • Patent number 3,986,224
    • Issue date Oct 19, 1976
    • Teh-tsao Yang
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3805312
    • Patent number 3,805,312
    • Issue date Apr 23, 1974
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3613146
    • Patent number 3,613,146
    • Issue date Oct 19, 1971
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3418673
    • Patent number 3,418,673
    • Issue date Dec 31, 1968
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3395413
    • Patent number 3,395,413
    • Issue date Aug 6, 1968
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3262144
    • Patent number 3,262,144
    • Issue date Jul 26, 1966
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3066345
    • Patent number 3,066,345
    • Issue date Dec 4, 1962
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2997726
    • Patent number 2,997,726
    • Issue date Aug 29, 1961
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2874398
    • Patent number 2,874,398
    • Issue date Feb 24, 1959
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

  • Information Patent Application

    Apparatus Erasing Blackboard through Areas
    • Publication number 20110162163
    • Publication date Jul 7, 2011
    • National Central University
    • Shu-San Hsiau
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MULTI-FUNCTION BOARD ERASER STRUCTURE
    • Publication number 20110154608
    • Publication date Jun 30, 2011
    • TUN-HUANG TSOU
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Eraser for Blackboard
    • Publication number 20100313381
    • Publication date Dec 16, 2010
    • Ming-Feng Yu
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Chalk-dust collecting apparatus for blackboard eraser
    • Publication number 20080155778
    • Publication date Jul 3, 2008
    • Global Metal Supplier Corp.
    • Po-Cheng Li
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Chalk and dry marker eraser roller
    • Publication number 20070234498
    • Publication date Oct 11, 2007
    • Valerie Mornet Warner
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Vacuum eraser for blackboards
    • Publication number 20060260092
    • Publication date Nov 23, 2006
    • Hsi-Hur Lai
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Electronic blackboard eraser
    • Publication number 20030037404
    • Publication date Feb 27, 2003
    • Tung Ming Wu
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Dust collecting apparatus for eraser
    • Publication number 20030033686
    • Publication date Feb 20, 2003
    • Te-Hsi Liu
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Eraser having selectively openable and closable aperatures
    • Publication number 20030000042
    • Publication date Jan 2, 2003
    • Yu Long Wang
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES