You can go back and forth between patent searches, FDA searches, and regular search engine searches to find more. For example, a search for a patent might give you the name of a company with a patent. You can then use a search engine to find that company and its products. You also can go to the FDA site to find the product and then use the product classification to find other companies with similar products. From there, you can go back to patent searches with those company names or to use a search engine to find out more about the products those companies have on the market.