This situation is a patent ownership dispute. It is not feasible to go through the Patent Reexamination Board
Board. It can only be resolved through judicial channels, that is, filing a patent ownership dispute lawsuit. .
According to your description, the invention is a service invention, and the company should apply for a patent. The people in the research team only enjoy the rights of the inventor.
One case will be treated as one case. If a company is accused of infringement and the company raises objections to patent ownership during the process, the court will not hear the patent ownership dispute.