Have I got this straight?
For example, I'd quite fancy a certain 4-wheel Diesel shunter in a certain gauge.
Let's say a specific toy train provider subsequently announces this type, creates the cad, then IP registers the design.
Would that then prevent any other toy train provider from supplying said model, with the only difference being a lack of bonkers duplicated drive train, and featuring a motor that wouldn't run kicking & screaming from my preferred design of controller?
Well done DJ, you've just alienated someone else!