Some Patent lawsuits are taken on contingency (the winning lawers get a good size cut). This isn't common. See Jarg corp which was basically out of cash, then

Some Patent lawsuits are taken on contingency (the winning lawers get a good size cut). This isn't common. See Jarg corp which was basically out of cash, then hired lawyers on contingency (with patents licensed from Northeastern University) then sued google. I think google paid northeastern in a settlement.