B43L 1/00
|
Repeatedly-usable boards or tablets for writing or drawing |
B43L 1/02
|
Slates |
B43L 1/04
|
Blackboards |
B43L 1/06
|
Blackboards rigid |
B43L 1/08
|
Blackboards flexible |
B43L 1/10
|
Writing surfaces thereof |
B43L 1/12
|
Repeatedly-usable boards or tablets for writing or drawing having translucent writing surfaces producing visual impressions by co-operation with backing members |
B43L 3/00
|
Writing or drawing-underlays, e.g. blotting pads |
B43L 5/00
|
Drawing-boards |
B43L 5/02
|
Drawing-boards having means for clamping sheets of paper thereto |
B43L 7/00
|
Straightedges |
B43L 7/02
|
T-squares |
B43L 7/04
|
Straightedges with rollers |
B43L 7/08
|
Straightedges with arrangements for attaching additional drawing equipment, e.g. for hatching, dotting |
B43L 7/10
|
Plural straightedges relatively movable |
B43L 7/12
|
Square and pivoting straightedges |
B43L 7/14
|
Square and sliding straightedges |
B43L 7/027
|
Plural non-adjustable straightedges fixed at right angles |
B43L 7/033
|
Plural non-adjustable straightedges forming non-right angles |
B43L 9/00
|
Circular curve-drawing or like instruments |
B43L 9/02
|
Compasses |
B43L 9/04
|
Beam compasses |
B43L 9/06
|
Compasses with legs formed by flat springs |
B43L 9/08
|
Proportional compasses or dividers |
B43L 9/10
|
Proportional compasses or dividers with arrangements for drawing polygons |
B43L 9/12
|
Dividers |
B43L 9/14
|
Circular curve-drawing or like instruments with changeable leg-ends for conversion into compasses, dividers, or callipers |
B43L 9/16
|
Features common to compasses, dividers, or callipers |
B43L 9/18
|
Legs with toggle joints |
B43L 9/20
|
Pivots |
B43L 9/22
|
Leg-angle adjusting-means separate from pivots |
B43L 9/24
|
Means for mounting points or writing appliances on legs |
B43L 11/00
|
Non-circular-curve-drawing instruments |
B43L 11/02
|
Non-circular-curve-drawing instruments for drawing conic sections |
B43L 11/04
|
Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses |
B43L 11/05
|
Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses with gears |
B43L 11/06
|
Non-circular-curve-drawing instruments for drawing spirals |
B43L 11/08
|
Non-circular-curve-drawing instruments for drawing involutes |
B43L 11/045
|
Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses with cords or like flexible elements |
B43L 11/055
|
Non-circular-curve-drawing instruments for drawing conic sections for drawing ellipses with guides |
B43L 12/00
|
Means to prevent slippage |
B43L 12/02
|
Means to prevent slippage magnetic |
B43L 13/00
|
Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for |
B43L 13/02
|
Drafting machines or drawing devices for keeping parallelism |
B43L 13/04
|
Guides for rulers |
B43L 13/06
|
Guides for rulers with pivoted guide rods |
B43L 13/08
|
Protractor heads |
B43L 13/10
|
Pantographic instruments for copying, enlarging, or diminishing |
B43L 13/12
|
Multiple writing devices |
B43L 13/14
|
Devices for drawing in perspective |
B43L 13/16
|
Devices for drawing in perspective free-hand |
B43L 13/18
|
Devices for drawing in perspective free-hand having optical or projecting equipment |
B43L 13/20
|
Curve rulers or templets |
B43L 13/22
|
Adjustable curve rulers |
B43L 13/24
|
Devices for generating stepwise movements of drawing equipment, e.g. for hatching |
B43L 15/00
|
Supports for attachment to hands or arms for facilitating writing or drawing |
B43L 17/00
|
Blotters |
B43L 17/02
|
Blotters for blotting-paper sheets |
B43L 17/04
|
Blotters for blotting-paper sheets hand-held |
B43L 17/06
|
Blotters for reeled blotting-paper |
B43L 17/08
|
Roller blotters |
B43L 17/10
|
Blotters using blotting material other than paper |
B43L 19/00
|
Erasers, rubbers, or erasing devices; Holders therefor |
B43L 19/02
|
Erasing knives |
B43L 19/04
|
Fibrous erasers |
B43L 21/00
|
Blackboard or slate-cleaning devices |
B43L 21/02
|
Blackboard or slate-cleaning devices with means for absorbing the chalk dust |
B43L 21/04
|
Wiper holders |
B43L 23/00
|
Sharpeners for pencils or leads |
B43L 23/02
|
Sharpeners for pencils or leads with gearing |
B43L 23/04
|
Sharpeners for pencils or leads with gearing with cranked handles |
B43L 23/06
|
Sharpeners for pencils or leads in which the pencils or leads are sharpened by only axial movement against cutting blades |
B43L 23/08
|
Sharpeners for pencils or leads in which the pencils or leads are sharpened mainly by rotational movement against cutting blades |
B43L 25/00
|
Ink receptacles |
B43L 25/02
|
Ink receptacles with separate dipping-cups |
B43L 25/04
|
Ink receptacles with separate dipping-cups supplied by pressure arrangements |
B43L 25/06
|
Ink receptacles with separate dipping-cups supplied by tilting the receptacles |
B43L 25/08
|
Ink receptacles with arrangements for dissolving ink powder |
B43L 25/10
|
Ink receptacles with means for holding objects |
B43L 25/12
|
Ink receptacles with pen-wiping means |
B43L 27/00
|
Ink stands |
B43L 27/02
|
Ink stands having means for securing objects thereon |
B43L 27/04
|
Ink stands securable to other objects |