by means of a compass

Patents Grantslast 30 patents

  • Information Patent Grant

    Instrument for drawing ellipse or the like

    • Patent number 7,461,459
    • Issue date Dec 9, 2008
    • Yu-Hui Lin
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Compass and ellipsograph for persons with manual limitations

    • Patent number 6,981,328
    • Issue date Jan 3, 2006
    • Roy O. Solum
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Ellipsograph

    • Patent number 6,308,426
    • Issue date Oct 30, 2001
    • Hyoun-Gyu Lim
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Powered toy hand drawing device

    • Patent number 5,933,970
    • Issue date Aug 10, 1999
    • 4Kidz, Inc.
    • James Diresta
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Conic section compass

    • Patent number 5,870,830
    • Issue date Feb 16, 1999
    • Yen-Hung Wu
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Compass able to draw any-size ellipses

    • Patent number 5,546,664
    • Issue date Aug 20, 1996
    • Ming-Shish Kuo
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Device for drawing ellipses

    • Patent number 4,567,662
    • Issue date Feb 4, 1986
    • Peter Wallner
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Ellipse compass

    • Patent number 4,204,327
    • Issue date May 27, 1980
    • Naguib F. Danial
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Ellipsograph

    • Patent number 4,169,315
    • Issue date Oct 2, 1979
    • Lin Sin
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Instrument for tracing curved figures particularly ellipses

    • Patent number 4,150,487
    • Issue date Apr 24, 1979
    • Aharon P. Grundman
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Ellipse drawing instrument

    • Patent number 4,010,546
    • Issue date Mar 8, 1977
    • Pi Ching-Tien
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3719996

    • Patent number 3,719,996
    • Issue date Mar 13, 1973
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3521361

    • Patent number 3,521,361
    • Issue date Jul 21, 1970
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3469319

    • Patent number 3,469,319
    • Issue date Sep 30, 1969
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3461564

    • Patent number 3,461,564
    • Issue date Aug 19, 1969
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3137945

    • Patent number 3,137,945
    • Issue date Jun 23, 1964
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3104466

    • Patent number 3,104,466
    • Issue date Sep 24, 1963
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3085341

    • Patent number 3,085,341
    • Issue date Apr 16, 1963
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3084441

    • Patent number 3,084,441
    • Issue date Apr 9, 1963
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3065544

    • Patent number 3,065,544
    • Issue date Nov 27, 1962
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3016611

    • Patent number 3,016,611
    • Issue date Jan 16, 1962
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2899748

    • Patent number 2,899,748
    • Issue date Aug 18, 1959
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2725634

    • Patent number 2,725,634
    • Issue date Dec 6, 1955
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2707831

    • Patent number 2,707,831
    • Issue date May 10, 1955
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2690013

    • Patent number 2,690,013
    • Issue date Sep 28, 1954
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2645854

    • Patent number 2,645,854
    • Issue date Jul 21, 1953
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2636272

    • Patent number 2,636,272
    • Issue date Apr 28, 1953
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2632953

    • Patent number 2,632,953
    • Issue date Mar 31, 1953
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2577905

    • Patent number 2,577,905
    • Issue date Dec 11, 1951
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2498798

    • Patent number 2,498,798
    • Issue date Feb 28, 1950
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents