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  • B43L13/145
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BPERFORMING OPERATIONS TRANSPORTING B43Writing accessories B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING B43L13/00Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for

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B43L13/145Rulers
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Fractal-based mandala drawing toolset
    • Patent number 11,787,224
    • Issue date Oct 17, 2023
    • Yaaqov Israel Ben-David
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Artist perspective tool
    • Patent number 11,440,338
    • Issue date Sep 13, 2022
    • Martha Christine Heppard
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Artist perspective tool
    • Patent number 10,850,554
    • Issue date Dec 1, 2020
    • Martha Christine Heppard
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Multifunction caliper instrument for the arts
    • Patent number 7,043,849
    • Issue date May 16, 2006
    • Delmar Laurence Leger
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Portable drawing board for art students
    • Patent number 6,487,784
    • Issue date Dec 3, 2002
    • Jayson J. Powers
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Articulated drafting device for drawing perspectives
    • Patent number 5,632,094
    • Issue date May 27, 1997
    • John A. Mills
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Perspective drawing machine
    • Patent number 4,899,454
    • Issue date Feb 13, 1990
    • Trig.o.metrics Corporation
    • John G. R. Francis
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drafting device
    • Patent number 4,823,475
    • Issue date Apr 25, 1989
    • Poul E. Hoegh
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Perspective drawing apparatus
    • Patent number 4,586,265
    • Issue date May 6, 1986
    • William G. Hopkins
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Perspective drafting instrument
    • Patent number 4,565,016
    • Issue date Jan 21, 1986
    • Ronald T. Horbinski
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Geometrical instrument
    • Patent number 4,159,571
    • Issue date Jul 3, 1979
    • John H. Jervis
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Straightedge
    • Patent number 4,007,542
    • Issue date Feb 15, 1977
    • Fred R. Bergendorff
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2981004
    • Patent number 2,981,004
    • Issue date Apr 25, 1961
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2810197
    • Patent number 2,810,197
    • Issue date Oct 22, 1957
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2210895
    • Patent number 2,210,895
    • Issue date Aug 13, 1940
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    1986506
    • Patent number 1,986,506
    • Issue date Jan 1, 1935
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

  • Information Patent Application

    A FRACTAL-BASED MANDALA DRAWING TOOLSET
    • Publication number 20220219484
    • Publication date Jul 14, 2022
    • Yaaqov Israel BEN-DAVID
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    ARTIST PERSPECTIVE TOOL
    • Publication number 20210053384
    • Publication date Feb 25, 2021
    • Martha Christine Heppard
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    ARTIST PERSPECTIVE TOOL
    • Publication number 20200180350
    • Publication date Jun 11, 2020
    • Martha Christine Heppard
    • G01 - MEASURING TESTING