I hadn't thought about it that way and I'm not sure I understand the question... sorry!
Mazda, may own the patent on a design they brought into existence. Yet, it can (and will) have the manufacturing contracted elsewhere. Subsequent component assembly (itself) could indeed be done with an additional third-party (though it does not have to) and final assembly (will most likely) take place at a Mazda plant.
Globalization connects economies and as a purely practical matter makes production more efficient in certain ways (that can be a good thing and it could be a bad thing). That's why I asked the question. Sometime people don't take the entirety of the supply chain into consideration when they ask such questions. There are many different companies and countries involved in bringing a vehicle to market. Products containing a large number of finished components (these days) are hardly ever produced under a single roof top.
For example, Mazda, designed a new Torque Converter for the Transmission that is used in the new CX-9. It is there design. However, I'm almost positive that at least some of its components come from a list (large or small) of various manufacturers. For reasons of national economic support, Mazda may restrict or require that those components be produced only in Japan (I don't know this is the case for certain, just giving an example of how it might work).
So, does your CX-9 Torque Converter come from Mazda? Yes, and no. [in the scenario given above] Is it Japanese designed and built? Absolutely, yes.
To get the truth of the matter, you would have to contact Mazda and ask them for a list of their component manufacturers (if they would even give it to you). For basic hardware that gets continually reused throughout the product line, they will have a list of Parts Suppliers. However, Component Manufacturing is a different animal and I don't know if you can get access to that information from the outside. I've never tried, but it would be interesting to find out - now that you bring up the question.