Google has filed for a patent on needle-free blood-drawing technology, described in a USPTO application published last week. Application 20150342509 suggests four potential implementations of the technology, including its use in a device that has an evacuated negative-pressure barrel with a membrane sealing an aperture at the far end containing an accelerator barrel. Upon activating a trigger, pressurized gas would shoot a microparticle within the accelerator barrel to subsonic speeds.from TechNewsWorld http://ift.tt/1NhzeLJ
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