Inventor Diversity for Economic Advancement Act of 2019 or the IDEA Act This bill directs the U.S. Patent and Trademark Office to collect demographic information about each inventor listed on a patent application. Inventors shall not be required to provide the requested information, which shall include gender, ethnicity, national origin, sexual identity, veterans status, disability, and education and income levels. Such information shall be (1) kept confidential and separate from each patent application, and (2) periodically made public as aggregated data without personally identifying information.