• The date of reduction to practice is critical in determining priority between inventors competing for a patent on the same invention. See INVENTION. [Cases: Patents 90(5). C.J.S. Patents § 123.]
reduction to practice
Patents. The embodiment of the concept of an invention, either by physical construction and operation or by filing a patent application with a disclosure adequate to teach a person reasonably skilled in the art how to make and work the invention without undue experimentation.