This is a first entry dealing with Patent Drawings. From NB Graphics and Associates, Inc., a company with vast experience in the Patent Drawing field.
Patent Drawing Requirements – Surface Shading
A skilled drafts person will make certain when preparing formal utility or design patent drawings that shading is correctly applied. “Shading shows clearly the character and contour of all surfaces of any three-dimensional aspect of the design”. Bold lines are a part of surface shading and should be used to emphasize openings, indentations, raised areas and the shadow side of an outline of an object.
Reference from: United States Patent and Trademark Office - A Guide to Filing a Design Patent Application – Surface Shading
Labels: design, drawings, issues, patent, rejection, USPTO