In addition to using lawsuits to over turn patents, opposing attorney's can also initiate a reexam process. Of course, this only results in attorney's fees of a couple thousand dollars. So most lawyers don't go this route since litigating a patent claim can easily generate millions of dollars of revenue. Here's a site which talks about the process: Reexamination - How does a bad patent get invalidated?
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In addition to using lawsuits to over turn patents, opposing attorney's can also initiate a reexam process. Of course, this only results in attorney's fees of a couple thousand dollars. So most lawyers don't go this route since litigating a patent claim can easily generate millions of dollars of revenue. Here's a site which talks about the process: Reexamination - How does a bad patent get invalidated?
Well, that'd include most deities