A means for collecting and spotting a small amount of blood which comprises a cylinder, a piston, and a puncturing tip, wherein: the piston is inserted airtightly into one end of the cylinder; the puncturing tip is airtightly and exchangeably fitted onto another end of the cylinder; the puncturing tip...http://www.google.fr/patents/US5569287?utm_source=gb-gplus-shareBrevet US5569287 - Means for collecting and spotting small amount of blood
Means for collecting and spotting small amount of blood
