 Three things to do if somebody has already filed a patent on your idea. First, you can review the claims, try to see how broad or narrow the idea is claimed and there might be ways around it. Second, you can pivot and perhaps use your idea in a slightly different way and look for non-obvious improvements. And third, you can combine your idea with something different to create a system that's unique and you can proceed with that system separate and apart from the individual components.