TREA

with perforated or marked discs

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Industry

  • CPC
  • B43L9/002
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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 B43L9/00Circular curve-drawing or like instruments

Current Industry

B43L9/002with perforated or marked discs
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Educational ruler
    • Patent number 9,897,427
    • Issue date Feb 20, 2018
    • Zhi Shang
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Circle marking device
    • Patent number 8,806,766
    • Issue date Aug 19, 2014
    • David M. Lee
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Circle drawing tool
    • Patent number 5,987,760
    • Issue date Nov 23, 1999
    • Walter's Co., Ltd.
    • Walter W. Hsu
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Circle cutter
    • Patent number 5,974,672
    • Issue date Nov 2, 1999
    • Welter's Co., Ltd.
    • Walter W. Hsu
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Tool for drawing circumferences
    • Patent number 5,390,418
    • Issue date Feb 21, 1995
    • Patricio A. Buono
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Rotary circle template
    • Patent number 5,384,964
    • Issue date Jan 31, 1995
    • Dennis E. McKay
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Method and device for drawing curved lines
    • Patent number 5,347,721
    • Issue date Sep 20, 1994
    • William M. Asterino
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drafting instrument
    • Patent number 5,125,161
    • Issue date Jun 30, 1992
    • Darren E. Guthrie
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drafting instrument
    • Patent number 4,899,449
    • Issue date Feb 13, 1990
    • Simon Fouladian
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Method and template for circle layouts
    • Patent number 4,624,057
    • Issue date Nov 25, 1986
    • William A. Hursey
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Infinite radius circle drawing instrument
    • Patent number 4,530,156
    • Issue date Jul 23, 1985
    • John S. Kettlestrings
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Toy-like instrument for drawing circles
    • Patent number 4,353,166
    • Issue date Oct 12, 1982
    • John S. Kettlestrings
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Circle drawing and measuring device
    • Patent number 4,129,948
    • Issue date Dec 19, 1978
    • Edward E. Hatter
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3795053
    • Patent number 3,795,053
    • Issue date Mar 5, 1974
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2499518
    • Patent number 2,499,518
    • Issue date Mar 7, 1950
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2003172
    • Patent number 2,003,172
    • Issue date May 28, 1935
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    1154673
    • Patent number 1,154,673
    • Issue date Sep 28, 1915
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    555287
    • Patent number 555,287
    • Issue date Feb 25, 1896
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES