Best Mode requirement

The "best mode requirement" in the United States is an additional requirement complementing the sufficiency of disclosure requirement. That is, the disclosure must also contain the inventor's "best mode" of making or practicing the invention. The "best mode requirement" only applies to what the inventor knows at the time the application was filed, not as to what was subsequently discovered.

Matthew J. Dowd, Nancy J. Leith and Jeffrey S. Weaver, Nanotechnology and the Best Mode, Nanotechnology Law & Business Journal, September 2005.
Matthew J. Dowd, Elimination of the Best Mode: Throwing the Baby Out with the Bathwater?, IPL Newsletter Fall 2005.