[JURIST] The US Senate [official website] Thursday voted 89-9 to approve legislation [roll call vote] to amend the US patent system for the first time since 1952. The America Invents Act [HR 1249 materials], sponsored by Congressman Lamar Smith (R) [official website], proposes significant changes to the current US patent system. One of these would result in the conversion from a system of "first to invent" to a system of "first to file", a change which Congress supports because of…