The company registered two new drone models - dubbed the M2 and B3 - for testing in Colorado, the first evidence of innovation since Google X boss Astro Teller announced in March that its original design was too hard to control.
The original prototype took off vertically and then shifted to a horizontal position for flight, but it's unclear from the FAA documents how these new drones work.
The Guardian reported in August that Google had been side-stepping FAA regulation by flying over private land as part of a deal with NASA, but these new registrations indicate it's ready to play by the books.
Google envisions its delivery drones being able to transport packages more quickly than regular methods, while cutting down on pollution.
Also worth noting: although the registration were made by Google Inc., cofounder Larry Page made it clear the company's drone efforts will now be part of Google's parent company, Alphabet.
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