Posted Nov 18, 2012 22:45 UTC (Sun) by khim (subscriber, #9252)
[Link]
Most probably it was not exactly the same. That's the trick: you get the patent by adding tiny alterations of what was done before (thus prior art does not invalidate your patent), then when you sue everyone try to downplay these changes.
Often you don't even need to downplay anything because people naturally tend to recreate most popular environment (think how MS Office changed it's look over time and how huge number of developers immediately followed).