Z:gnu-www-ja-stallman-mec-india--cbc9fd-In the US there are over a hun/en

In the US there are over a hundred thousand of them; maybe two hundred thousand by now. This is just an estimate. I know that 10 years ago they were issuing 10,000 a year and I believe that it has accelerated since then. So it's too much for you to keep track of them unless that's your full-time job. Now you can try to search for the ones that are relevant to what you are doing, and this works some of the time. If you search for certain keywords or follow links, you'll find some patents that are relevant to what you're doing. You won't find them all.