Here is yet another case of a company with money harassing a little guy to stop GIVING his product away for free. Apparently, a company called KAM sells software that interfaces between model railroads and your computer. There is also Ben Jacobsen that gives away software that does the same thing AND it is open source. Well KAM sent him an invoice for $200,000 saying that because of his infringement on their patents, he owes them $30/user of his software.

But it turns out his software predates their patents by 6 months.