A sale more than a year before the application will generally bar a patent even if the invention is embedded so deeply within a larger system that it could never be discovered.

Question

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A sale of an invention more than one year before filing a patent application can bar the patentability of the invention under the "on-sale bar" provision of U.S. patent law, regardless of whether the invention is visible or embedded within a larger system.

A Sale More Than a Year Before the Application Will