According to the AIA, what is the effective date for the changes regarding inventor-assignee filings?

The effective date for the changes regarding inventor-assignee filings, as established by the America Invents Act (AIA), is September 16, 2012. This date marks the implementation of several significant changes to U.S. patent law, including provisions related to the filing of patent applications by assignees rather than just inventors. These changes were part of a broader shift aimed at aligning U.S. patent practices with those in other countries, promoting greater efficiency and clarity in the patent system.

The AIA introduced the ability for assignees to file patent applications directly, which facilitated the assignment process and enhanced the protection of intellectual property. This key adjustment reflects a modernized approach to patent application practices that acknowledges the evolving nature of innovation and ownership in the context of collaborative and corporate environments.

The other dates listed do not align with the introduction of these specific changes under the AIA. For example, June 1, 2011, and January 1, 2010, predate the AIA's implementation, while December 31, 2013, is thereafter, suggesting these options do not reflect the correct timeline for when inventor-assignee filings were officially changed.