A good example of an American company doing interesting and innovative things in high-end manufacturing is Tesla Motors. Tesla is a household name I think many can relate to and gives us a strong feeling of pride of what a US-based company with local manufacturing capability can do, even though it sources components from overseas. The same can be said for Elon Musk’s other company, SpaceX.
Apple also has in a very limited way and in recent years started manufacturing the Mac Pro in the United States. Again, materials are sourced outside the country, but final assembly happens here.
But the average citizen doesn’t get to play with a Mac Pro or experience a Tesla. Nanolumens manufactures large-scale super high resolution LED display units, which are typically installed in large public spaces. It is an American company that designs at the component level rather than just sourcing pre-designed components from overseas.