Patent Drawings

Patent drawings are one of the key components of a patent application. Professional drawings help completely cover the invention and all permutations. Detailed patent drawings can save you if a key component or feature was accidentally left out of the written disclosure. The USPTO frequently views drawings in order to determine what was disclosed at the time the application was filed.

There are several key components to creating patent drawings that the inventor, patent attorney, and ultimately the USPTO find readable, understandable, and aesthetically pleasing.

A patent drawing must be accurate. It should reflect the form, surface finish, and material of the subject matter. A patent drawing must be clear. Certain elements of the subject may be omitted, phantomed, or sectioned for increased clarity. The composition must be pleasing. How the subject fills the space and the choice of viewing angle contribute to the overall effect. The drawing technique should be appropriate. Line weights, tone, and shading should relate to the scale, mass, and surface of the subject.

How many views?

There should be as many views drawn as needed to clearly disclose the invention and its novelty, i.e., front, rear, right and left sides, top and bottom. While not required, it is suggested that perspective views be submitted to clearly show the shape and appearance of thee-dimensional designs. For design patent drawings, if a perspective view is submitted, the surfaces shown would normally not be required to be illustrated in other views if these surfaces are clearly understood and disclosed in the perspective.

How should the patent drawings be prepared?

The drawings should be done in black and white, unless color is needed to illustrate specifics of the invention or idea. The scale should be large enough to show the mechanism without crowding when the drawing is reduced to size in two-thirds in reproductions. Patent drawings should be done on high quality paper that is strong and non-glossy. All sheets must be free from cracks, creases and folds. Only one side of the sheet may be used for the drawing. Each sheet must be free from erasures and free from alterations, overwritings, and interlineations.

This is why it is best to hire a professional draftsman to do this work as it can be difficult to do for those who are not experienced with scaled drawings, multiple views and patent office standards.

At Inventia Patent Drafting, we pride ourselves on working closely with our clients. From a simple trademark drawing to complex design drawings; we have the knowledge and experience to create patent drawings that will satisfy your needs and meet the stringent requirements of the USPTO and PCT. Patent drafting is a business, and like all other businesses, we survive by our reputation. We are extremely proud of the reputation we have earned in this industry. For more information please visit

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