dgharmon writes: New research shows that Intellectual Ventures is tied to at least 1,300 shell companies whose sole purpose is to coerce real companies into buying patent license that they don’t want or need. Those who resist the “patent trolls” are dragged into nightmarish lawsuits.
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"