I have a bit over 20 patents, and my experience is pretty much in agreement with Lee's assessment. The USPTO only does a cursory search of prior art. As a result, a patent is just a ticket to permit litigation. Whether or not it is valid is not determined until the litigation is over. Also, according to US patent law, a disclosure must be enabling, meaning it provides enough detail that one "skilled in the art" could reproduce the work. Many do not meet this requirement nor the requirement that it should not be obvious to one skilled in the art. In reality, it only is required to be non-obvious to attorneys and judges.
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