A patent cannot be acquired for an invention that has been in public use for more than 1 year at the time of application.

Question

Quizplus · Accepted Answer

This is known as the "on sale bar" and is a requirement under the United States patent law. If an invention has been in public use or on sale for more than 1 year before a patent application is filed, it is considered to be no longer novel and cannot be patented.

A Patent Cannot Be Acquired for an Invention That Has