Back in 2017 I signed a patent contract with the company in which I used to work as one of the co-authors of an invention that was going to be patented in Europe. In this contract I was forced (otherwise I was going to be fired and I couldn't afford to lose my job at the moment) to renounce to any property over the invention. In turn the company compromised in the contract to recognize me as one of the author's of the patent. A while after I left that company, because my relationship with it wasn't the best . Today, they contacted me saying that I need to sign another document full of terms that I don't agree with, for them to be able to extend the original patent to United States. The difference is that this time they can't say they will fire me if I don't sign. So instead they are saying that my name won't appear as one of the co-authors in United States. Would this be possible? A patent with less authors in US than in Europe? Wouldn't they be breaking the first agreement they made to recognize me as a co-author?