WORKING MODELS, PROTOTYPES, AND ILLUSTRATIONS FOR PATENTS
A working model or prototype is not necessary before the filing of a patent application with the United States Patent & Trademark Office. Often, however, those seeking to apply for a patent wil produce hand-drawn sketches or drawings of the invetion, in order to help the drafter of the application write a more detailed, descriptive, and accurate rendition of the characteristics of the invention.
Where the invention is a process or method, a flow chart showing the steps can be prepared. Such materials are very helpful in understanding the uique features of the invention and provide a starting point from which professional patent illustrations can be prepared.
It is advisable for those seeking patent protection with the United States Patent & Trademark Office to consult with a patent attorney who is more familiar with the intricacies involved in drafting a patent application that will uphold the standards of patentability.