Two recent patent battle lawsuits made news this week, and both highlighted one troubling aspect of patent lawsuits: patent holders trying to damage others beyond the company that infringed. Now, before the patent system defenders rush to post angry comments, this is not a new thing. It's been quite common for a while. Nor is it surprising. If you were a patent attorney representing one of these patent holders, you'd probably do the same thing: going after third parties is probably a good strategy to force the other company to settle. However, it does highlight how patent law is used in ways that clearly are outside of its intended purpose. That is, it's being used to punish plenty of innocent third parties by removing innovation from their grasps, rather than encouraging innovation.

The first case involves a patent lawsuit concerning Microsoft's Visual Studio. WebXchange claims it has patents that Visual Studio violates -- but rather than suing Microsoft, WebXchange sued three Microsoft customers, claiming that by using the software, they were violating the patent. This is clearly an attempt to scare Microsoft into settling, out of a fear that other customers won't use Visual Studio to avoid getting sued by WebXchange. Microsoft is fighting back, asking a judge to declare the patents invalid, but in the meantime, WebXchange has been able to drag Microsoft's customers into a patent battle, putting extra pressure on Microsoft to settle.

The second case involves Spansion suing Samsung for patent infringement concerning Samsung's memory chips. In this case, Spansion isn't just going after Samsung, but demanding an injunction that would block US sales of a variety of popular gadgets that use Samsung's memory chips -- including iPods and Blackberries. Once again, while it's unlikely that a court would order such a block, by dragging other companies such as Apple and RIM into the mess, Spansion is abusing the patent system's threat of an injunction to put extra pressure on Samsung to settle.

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