TREA

for drawing ellipses

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  • CPC
  • B43L11/04
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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 B43L11/00Non-circular-curve-drawing instruments

Current Industry

B43L11/04for drawing ellipses
Industries

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

    Thread ruler and a multi-function drafting instrument
    • Patent number 7,080,459
    • Issue date Jul 25, 2006
    • Ashfaq A. Khan
    • 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

    Oval cutter
    • Patent number 6,374,503
    • Issue date Apr 23, 2002
    • Alterra Holdings Corporation
    • Christopher Carlson
    • 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

    Ellipse drawing/cutting device
    • Patent number 6,276,067
    • Issue date Aug 21, 2001
    • Welter's Co., Ltd.
    • Walter W. Hsu
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Oval cutter
    • Patent number 6,158,133
    • Issue date Dec 12, 2000
    • Fiskars Inc.
    • Christopher Carlson
    • 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

    Irregular surface ellipsograph
    • Patent number 5,123,171
    • Issue date Jun 23, 1992
    • Charles F. Langston
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Structure of isometric ellipse scale
    • Patent number 5,065,523
    • Issue date Nov 19, 1991
    • Chieh-Tseng Chiang
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Apparatus for cutting various forms out of a picture frame mat or t...
    • Patent number 4,790,222
    • Issue date Dec 13, 1988
    • Carey C. Morgan
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Geometry template
    • Patent number 4,736,526
    • Issue date Apr 12, 1988
    • Eric Hsia
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Ellipsograph
    • Patent number 4,688,331
    • Issue date Aug 25, 1987
    • Xingdi Shen
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Apparatus for drawing an ellipse using a piece of string
    • Patent number 4,594,784
    • Issue date Jun 17, 1986
    • Mikio Ito
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Pantograph
    • Patent number 4,571,836
    • Issue date Feb 25, 1986
    • Marian Poll
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Ellipsograph
    • Patent number 4,571,837
    • Issue date Feb 25, 1986
    • Tien-Fu Cheng
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Ellipsograph
    • Patent number 4,570,344
    • Issue date Feb 18, 1986
    • John E. Clegg
    • 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

    Ellipsograph capable of drawing dotted line
    • Patent number 4,563,819
    • Issue date Jan 14, 1986
    • Tien-Fu Ching
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drawing assembly
    • Patent number 4,445,275
    • Issue date May 1, 1984
    • David Dubrow
    • 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

    Drawing instrument for an ellipse
    • Patent number 4,182,043
    • Issue date Jan 8, 1980
    • Yoshio Nemoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drafting instrument
    • Patent number 4,174,572
    • Issue date Nov 20, 1979
    • Tom T. Mikulin
    • 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

    Ellipsograph drafting apparatus
    • Patent number 4,045,875
    • Issue date Sep 6, 1977
    • Raul Chajon Cortez
    • 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

    Device for drawing ellipses
    • Patent number 3,947,968
    • Issue date Apr 6, 1976
    • Danny Rosenheck
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents