Z:gnu-www-ja-software-patents--19d02e-There are cases where even IBM/en

There are cases where even IBM cannot make someone cross-license. That is when there is a company whose sole business is taking a patent and squeezing money out of people. The company that had the natural order recalculation patent was exactly such a company. Their sole business was to threaten to sue people and collect money from people who were really developing something.