Say that an individual were a slave in the United States before the passage of the 13th Amendment to the US Constitution, abolishing slavery. Could such a slave own intellectual property over things they created (let's assume it was of their own volition and not as a request of their owner)?
For instance, would they own the copyright to a work of art that they created, or have the ability to patent an invention they made? If not, could their owner claim that ability? Or could they claim it after they had been freed?