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  • CPC
  • B43L13/048
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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

B43L13/048with T-squares
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Drafting machine
    • Patent number 4,559,715
    • Issue date Dec 24, 1985
    • Walter Weglin
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drafting apparatus
    • Patent number 4,481,719
    • Issue date Nov 13, 1984
    • Roger Grover
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drawing instrument and locking apparatus therefor
    • Patent number 4,449,304
    • Issue date May 22, 1984
    • Binney & Smith Inc.
    • Ronald E. Underwood
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drafting machine
    • Patent number 4,438,569
    • Issue date Mar 27, 1984
    • Gillespie; Robert J.
    • Walter Weglin
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Drafting apparatus
    • Patent number 4,343,094
    • Issue date Aug 10, 1982
    • Reppisch-Werke AG
    • Lorenzo Ubezio
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Adjustable straight edged device for use with drafting board
    • Patent number 4,334,364
    • Issue date Jun 15, 1982
    • Eberhard Faber, Inc.
    • John E. Nelson
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Guideline and layout ruler for calligraphers
    • Patent number 4,255,867
    • Issue date Mar 17, 1981
    • Ronald B. Taylor
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Portable drawing apparatus
    • Patent number 4,224,742
    • Issue date Sep 30, 1980
    • Lloyd E. Clarke
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    T-square
    • Patent number 4,162,578
    • Issue date Jul 31, 1979
    • Emmanuel G. Astarita
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Cursor assembly
    • Patent number 4,102,050
    • Issue date Jul 25, 1978
    • Ronald Arthur Roth
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Graphic recording system
    • Patent number 4,090,301
    • Issue date May 23, 1978
    • F. Peter Della Monica
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Protractor-type hatching control device
    • Patent number 4,084,329
    • Issue date Apr 18, 1978
    • Glenn Talley Randol
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3745657
    • Patent number 3,745,657
    • Issue date Jul 17, 1973
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3585725
    • Patent number 3,585,725
    • Issue date Jun 22, 1971
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3537183
    • Patent number 3,537,183
    • Issue date Nov 3, 1970
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3525156
    • Patent number 3,525,156
    • Issue date Aug 25, 1970
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3380166
    • Patent number 3,380,166
    • Issue date Apr 30, 1968
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3273244
    • Patent number 3,273,244
    • Issue date Sep 20, 1966
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3224100
    • Patent number 3,224,100
    • Issue date Dec 21, 1965
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3180027
    • Patent number 3,180,027
    • Issue date Apr 27, 1965
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3137072
    • Patent number 3,137,072
    • Issue date Jun 16, 1964
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3103747
    • Patent number 3,103,747
    • Issue date Sep 17, 1963
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    3086291
    • Patent number 3,086,291
    • Issue date Apr 23, 1963
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2995823
    • Patent number 2,995,823
    • Issue date Aug 15, 1961
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2936524
    • Patent number 2,936,524
    • Issue date May 17, 1960
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2874474
    • Patent number 2,874,474
    • Issue date Feb 24, 1959
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2872735
    • Patent number 2,872,735
    • Issue date Feb 10, 1959
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2854751
    • Patent number 2,854,751
    • Issue date Oct 7, 1958
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2602611
    • Patent number 2,602,611
    • Issue date Jul 8, 1952
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    2574463
    • Patent number 2,574,463
    • Issue date Nov 13, 1951
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES