Patents can’t be owned by companies. Only individuals. In the event of any patent being the result of a team effort each person responsible for its development is gets a proportion of profits from it.

If person develops a patent while employed at a corporation that company owns a lease on the patent lasting 10 or 20 years or something .

I’m sure there’s holes in this you can drive a truck through but high level I feel like there is something there.

I also can’t be arsed to flesh it out further.