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All patent applications require at least one drawing with very few exceptions. Design patents usually require at least six to show each perspective.  The majority of patent drawings require reference numbers to identify elements, components, and parts. These numbers are used throughout the written description to describe and explain how the invention works and is used. It is very important to correctly number these elements in a sequential and consistent manner.
 About Patent Drawings The USPTO has strict guidelines for technical drawings that must be followed when submitting an application. Drawings that do not conform to these standards may be rejected. The purpose of a drawing requirement is to visually convey all of the details that describe how the invention works and is used. The written description and drawings must match. Utility Patents: All features and functionality Design Patents: Every view Plant Patents: Distinguishing characteristics There are several different types of drawings depending on the type of invention, or what the inventor wants to explain. Orthogonal Views (2-D) Front Rear Top Bottom Left Right Perspective Views (3-D) Front Rear Top Bottom Left Right Other Views Exploded Sectional Electronic Schematics Block Diagrams Flowcharts Chemical Formulas Waveforms Tables Plots Graphical techniques for patent drawings Shading Hatching Projection Lines Lead Lines Brackets Labels Numbers Letters Reference Characters Scale Paper Orientation Margins Type of Paper |