I dealt with a manufacturing patent where you had to align certain parts off-center, because lining them up was patented. Of course it didn't really matter how

I dealt with a manufacturing patent where you had to align certain parts off-center, because lining them up was patented. Of course it didn't really matter how you did it. Hence a subsequent patent was eventually actually awarded to someone else to manufacture them off-center. Which was far worse if you think about it. The first patent claimed a unique point. The next one claimed the entire three-dimensional volume of possible alternatives--minus that unique point.