What type of assignments does the AIA simplification address regarding inventor-assignee filings?

The correct answer reflects the intent of the America Invents Act (AIA) to streamline the process of inventor-assignee filings. Under the AIA, the requirement is simplified, such that an inventor can file a patent application with a simple statement of assignment. This is a significant shift from previous practices, where more elaborate, detailed, or contractual assignments were often needed. The AIA aims to reduce the burden on inventors and to facilitate the patent application process by allowing these simpler filings, thus making it easier for inventors to assign their patents to entities like employers or companies without engaging in complex legal documentation.

The other choices do not align with the AIA's focus on simplification. Complex contractual agreements require detailed negotiation and legal language, which goes against the goal of easy filing. Joint inventions may entail unique issues, but the AIA simplification applies broadly to assignments rather than only to those involving joint inventors. Lastly, the presence of legal representatives during assignments complicates the process further and does not align with the AIA’s aim for streamlined procedures, which is why the notion of needing a legal representative is not part of the simplification.