Nautilus, Inc. v. Biosig Instruments, Inc.
A patent claim is indefinite if, read in light of the specification and the prosecution history, fails to inform those skilled in the art about the scope of the invention with reasonably certainty.
A patent claim is indefinite if, read in light of the specification and the prosecution history, fails to inform those skilled in the art about the scope of the invention with reasonably certainty.
The Board redefined the standard for indefiniteness during prosecution as “plausible indefiniteness.”