Lancet device utilizing a body, a holding member configured to receive a lancet having the lancet needle, a first spring structured and arranged to move the holding member between at least a retracted position and an extended position, and a second spring structured and arranged to move the holding member...http://www.google.fr/patents/US8043318?utm_source=gb-gplus-shareBrevet US8043318 - Push-button lance device and method
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