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Normally design patent drawings are black and white line drawings. In some instances photographs can be submitted instead of drawings but only if a photograph is the only way to practically illustrate the design.
The design patent drawings should include surface shading for three dimensional objects to make the shape of the design clear.
The shading can be done with small lines or stippling (small dots). Line shading and stippling can be in the same drawing but should not be on the same surface. Also oblique lines should be used on the surface of a transparent, translucent, highly polished, or reflective surface.
A broken line – or in other words a dashed line – should be used for something which will not be included as part of the design. One common element, which is not included in the design is something which is shown for context, such as an environmental structure, like the design will be connected to another element. Also a broken line can show the boundary of the design. MPEP 1503.02(III)
MPEP 1503.02(V); 37 C.F.R. 1.152
There is no specific amount of drawings needed for a design patent application, but the drawings should not leave any part of the design in question. Usually there will be 7 drawings. This is usually broken down as: a straight on view of each of the 6 sides of the object and then an angled view also called a perspective view. There can also be two perspective views, one from the top and one from the bottom.
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