PATENTS VI. Do I Need to Make a Model to File a Patent Application?
In most cases it is not necessary to make a model of your invention in order to file a patent application in the United States Patent Office.
If the Patent Office questions whether your invention will function, the Patent Office may request a model or other proof that the invention will actually work. This hardly ever happens.
PHOTOGRAPH ATTRIBUTIONS: (1) "Clock". Thank you publicdomainpictures.net. (2) "Grain Mill Model" by Debra Nissle. Copyright 2014.