Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for

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

B43L13/001Mathematical drawing instruments B43L13/002Angle intersecting devices B43L13/004Manual lettering devices B43L13/005Portable combined drawing-aids including boards B43L13/007Contour tracing devices B43L13/008Circle transformers B43L13/02Draughting machines or drawing devices for keeping parallelism B43L13/022automatic B43L13/024Drawing heads therefor B43L13/026for writing characters or symbols B43L13/028Hand held or associated with the writing instrument B43L13/04Guides for rulers B43L13/041with toothed racks B43L13/043with squares B43L13/045with carriages B43L13/046with cables B43L13/048with T-squares B43L13/06with pivoted guide rods B43L13/08Protractor heads B43L13/10Pantographic instruments for copying, enlarging, or diminishing B43L13/12Multiple writing devices B43L13/14Devices for drawing in perspective B43L13/141Two-dimensional devices B43L13/142T-squares B43L13/143mounted on parallel-motion drawing appliances B43L13/144including protractors B43L13/145Rulers B43L13/146Squares B43L13/147Three-dimensional devices B43L13/148using copying or multiple drawing arrangements B43L13/149including grids B43L13/16free-hand B43L13/18having optical or projecting equipment B43L13/20Curve rulers or templets B43L13/201Stencils for drawing figures, objects B43L13/203human, animal, or vegetal figures B43L13/205geometrical figures B43L13/206material objects B43L13/208letters, numbers, symbols B43L13/22Adjustable curve rulers B43L13/24Devices for generating stepwise movements of drawing equipment