Over the years, the US Patent Office has lowered standards for drawings to the point where a sketch on a napkin can literally issue as a patent. Some inventors and patent attorneys still want a patent they would be proud to hang on the wall. VanSant Patent Services still does drawings in the traditional pen-and-ink style with the varied line width and shading that used to make a US patent a work of art.
Three dimensional views, complicated cross-sections, utility or design drawings, VPS can illustrate the invention in a clear and accurate way while also giving the patent drawings a traditional formal look.
