TREA

Two-dimensional devices

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Industry

  • CPC
  • B43L13/141
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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 B43L13/00Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for

Current Industry

B43L13/141Two-dimensional devices
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Perspective view drafting device
    • Patent number 7,204,028
    • Issue date Apr 17, 2007
    • John A. Mills
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Template set for drawing three-dimensional shapes
    • Patent number 7,055,259
    • Issue date Jun 6, 2006
    • Alfred Goldman
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Method and system for recording a viewing point
    • Patent number 6,785,972
    • Issue date Sep 7, 2004
    • Varda Goldberg
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Optical, image producing device
    • Patent number 6,623,130
    • Issue date Sep 23, 2003
    • Thomas W. Bramhill
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Portable device for removably positioning and resetting vanishing p...
    • Patent number 5,799,402
    • Issue date Sep 1, 1998
    • Jacques De Blois
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Perspective drafting apparatus
    • Patent number 4,918,822
    • Issue date Apr 24, 1990
    • Semond Levitt
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Apparatus for making perspective drawings
    • Patent number 4,688,334
    • Issue date Aug 25, 1987
    • CC&T Product Development Co., Inc.
    • Yeong-Haw Tsou
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Spacer device
    • Patent number 4,601,108
    • Issue date Jul 22, 1986
    • Neubert W. Swanson
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Perspective drawing templates
    • Patent number 4,505,041
    • Issue date Mar 19, 1985
    • Bill H. Keeney
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Apparatus for producing perspective drawings
    • Patent number 4,453,318
    • Issue date Jun 12, 1984
    • Jess W. Hayes
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Perspective view apparatus
    • Patent number 4,254,555
    • Issue date Mar 10, 1981
    • Emile E. Julian
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Standard parallel rule with perspective drawing device
    • Patent number 4,137,635
    • Issue date Feb 6, 1979
    • Douglas P. Harvey
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Instrument for making perspective drawing
    • Patent number 4,075,762
    • Issue date Feb 28, 1978
    • Kazuomi Ohtake
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3872597
    • Patent number 3,872,597
    • Issue date Mar 25, 1975
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3719995
    • Patent number 3,719,995
    • Issue date Mar 13, 1973
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3718975
    • Patent number 3,718,975
    • Issue date Mar 6, 1973
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3711953
    • Patent number 3,711,953
    • Issue date Jan 23, 1973
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3646683
    • Patent number 3,646,683
    • Issue date Mar 7, 1972
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3509632
    • Patent number 3,509,632
    • Issue date May 5, 1970
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3457648
    • Patent number 3,457,648
    • Issue date Jul 29, 1969
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3389470
    • Patent number 3,389,470
    • Issue date Jun 25, 1968
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3332152
    • Patent number 3,332,152
    • Issue date Jul 25, 1967
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3266154
    • Patent number 3,266,154
    • Issue date Aug 16, 1966
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3226831
    • Patent number 3,226,831
    • Issue date Jan 4, 1966
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3107430
    • Patent number 3,107,430
    • Issue date Oct 22, 1963
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3070894
    • Patent number 3,070,894
    • Issue date Jan 1, 1963
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2998654
    • Patent number 2,998,654
    • Issue date Sep 5, 1961
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2895223
    • Patent number 2,895,223
    • Issue date Jul 21, 1959
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2835974
    • Patent number 2,835,974
    • Issue date May 27, 1958
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2734274
    • Patent number 2,734,274
    • Issue date Feb 14, 1956
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents