Inventors’ Notebooks in a First-to-File Patent System

Since March 16, 2013, the United States has been under a first-inventor to-file patent system. Although it has always been good scientific practice for inventors to keep and maintain laboratory notebooks, it was all the more important in a first-to-invent patent system. In light of the recent changes in U.S. patent law, will keeping and maintaining a laboratory notebook have any importance for patent applications filed under the new system?