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Google’s Project Glass still remains a bit of a mystery, especially as to how users will operate the device. However, as the diagram above from Google’s just-approved patent application illustrates, its trackpad along the temple arms of the frame will control everything from menu navigation to e-mail/message scrolling and photo-taking. It suggests that, perhaps, voice-recognition won’t be as big a feature as previously imagined. Though, hopefully, the trackpad is merely a backup option to any voice app, therefore delivering on Google co-founder Sergey Brin’s promise of a thoroughly hands-free experience.

[via Engagdet