B43L11/04 - CPC Classification

Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses

• B43L11/041 » {by means of a compass} 2
• B43L11/043 » {with stencils} 0
• B43L11/045 » with cords or like flexible elements 0
• B43L11/05 » with gears 2
• B43L11/055 » with guides 0