It is good to see some of Apple's sillier claims falling. I can only hope Apple's "rounded corner" patent will follow soon.
USPTO invalidates all claims of 'Steve Jobs' multi-touch patent
USPTO invalidates Apple's "rubber-banding" patent asserted against Samsung
The Forbes article below says nearly 50% of patents are invalidated when litigated and 89% of patents that are reviewed by the USPTO are a partially or wholly invalidated.
A Powerful New Weapon Against Patent Trolls