What is required from inventors in their oath or declaration?

The requirement for inventors in their oath or declaration is that they must believe themselves to be an inventor. This is crucial because the declaration serves as a formal acknowledgement of their contribution to the invention, affirming that they are indeed the individuals who made a significant contribution to its conception. This personal affirmation helps maintain the integrity of the patent system by ensuring that only those who have genuinely participated in the invention claim ownership rights.

Regarding the other options, providing a contact address may be necessary for administrative purposes, but it is not a core requirement of the oath. Submitting a prototype is typically not mandated as part of the declaration process; rather, the inventor must provide a detailed description of the invention in the patent application. Similarly, having a lawyer present during the signing of the declaration is not a requirement, although it is common practice for inventors to seek legal counsel when navigating the patent process to ensure their interests are adequately protected.