This sounds like a somewhat obvious way to side-step the patent mechanism, so I would assume patents prevent this kind of a thing, when you develop patent-break

This sounds like a somewhat obvious way to side-step the patent mechanism, so I would assume patents prevent this kind of a thing, when you develop patent-breaking technology abroad and then "just use" it wherever you want. You're probably not allowed to use the patented technology in any of the products you're building.