TREA

T-squares

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Industry

  • CPC
  • B43L13/142
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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

B43L13/142T-squares
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Graphic alignment tool and method of using the same
    • Patent number 11,628,679
    • Issue date Apr 18, 2023
    • Louis Joseph Robin
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drafting apparatus
    • Patent number 5,077,904
    • Issue date Jan 7, 1992
    • James K. Michael
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drawing board
    • Patent number 4,380,124
    • Issue date Apr 19, 1983
    • Rogers; Colin Ward
    • Joseph Smith
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drafting system and apparatus
    • Patent number 3,978,587
    • Issue date Sep 7, 1976
    • Hilton Baugh
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3868777
    • Patent number 3,868,777
    • Issue date Mar 4, 1975
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3492727
    • Patent number 3,492,727
    • Issue date Feb 3, 1970
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3464117
    • Patent number 3,464,117
    • Issue date Sep 2, 1969
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3221410
    • Patent number 3,221,410
    • Issue date Dec 7, 1965
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3191307
    • Patent number 3,191,307
    • Issue date Jun 29, 1965
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3159918
    • Patent number 3,159,918
    • Issue date Dec 8, 1964
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3077667
    • Patent number 3,077,667
    • Issue date Feb 19, 1963
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2876547
    • Patent number 2,876,547
    • Issue date Mar 10, 1959
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2768444
    • Patent number 2,768,444
    • Issue date Oct 30, 1956
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2638674
    • Patent number 2,638,674
    • Issue date May 19, 1953
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2622326
    • Patent number 2,622,326
    • Issue date Dec 23, 1952
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2515357
    • Patent number 2,515,357
    • Issue date Jul 18, 1950
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2412194
    • Patent number 2,412,194
    • Issue date Dec 10, 1946
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    1990040
    • Patent number 1,990,040
    • Issue date Feb 5, 1935
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    1969758
    • Patent number 1,969,758
    • Issue date Aug 14, 1934
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    1705330
    • Patent number 1,705,330
    • Issue date Mar 12, 1929
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    1591380
    • Patent number 1,591,380
    • Issue date Jul 6, 1926
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    1381971
    • Patent number 1,381,971
    • Issue date Jun 21, 1921
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    1122533
    • Patent number 1,122,533
    • Issue date Dec 29, 1914
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    1064878
    • Patent number 1,064,878
    • Issue date Jun 17, 1913
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    891777
    • Patent number 891,777
    • Issue date Jun 23, 1908
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    495157
    • Patent number 495,157
    • Issue date Apr 11, 1893
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    482127
    • Patent number 482,127
    • Issue date Sep 6, 1892
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    475350
    • Patent number 475,350
    • Issue date May 24, 1892
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    312175
    • Patent number 312,175
    • Issue date Feb 10, 1885
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    21336
    • Patent number 21,336
    • Issue date Aug 31, 1858
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES