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This Day in Tech: Patent turns into a first-to-file system; two directors leave Twitter

Too busy to keep up with the tech news? Here are some of the more interesting stories from CNET News for Friday, September 16.

Too busy to keep up with the tech news? Here are some of the more interesting stories from CNET News for Friday, September 16.

• Patent overhaul signed into law by Obama. The Leahy-Smith America Invents Act is the first major patent reform since the 1950s, turning the system into a first-to-file patent system instead of a first-to-invent system.

CNET's Josh Lowensohn reports: "Proponents, including technology companies like Microsoft, Google, and Apple have rallied for the first-to-file system, saying it makes our intellectual-property system more competitive with those in foreign countries. While smaller businesses have said the change in filing standards puts them at a disadvantage." With all the patent wars going on, between Apple and Samsung, Google and Oracle, and Apple and HTC, among others, intellectual property has certainly been a heated topic lately.

• Roundup: Windows 8 debuts at Microsoft Build. When PC growth is slowing, can Windows 8 help change the perception?

• There's been another shake up at Twitter. Early investors Fred Wilson and Bijan Sabet are out. The microblogging site also loses its chief scientist, Summize co-founder Abdur Chowdhury.

• Any history buffs out there? Here's an app that turns your iPhone into a time machine.

• Seven states join effort to stop AT&T and T-Mobile deal. Most states are all for the deal, but some states express concern.

• BlackBerry outage hits e-mail, messenger. CNET's Roger Cheng wrote: "This isn't the first major outage that RIM has suffered from. The company suffered from a massive outage in 2007, and another major e-mail outage in late 2009. Sprinkled over the past few years have been a number of other smaller outages."

• So when is the iPhone 5 coming? CNET's Kent German updates his rumor roundup.

• Scientists announce the creation of printable, functional blood vessels.

• Hundreds of Go Daddy-hosted sites were compromised, causing visitors to be redirected to a site with malware on it.