A protection assembly to protect medical personnel from being inadvertently punctured by the pointed end of a medical needle of the type normally associated with a syringe, catheter assembly or I.V. administering structure. An elongated sleeve like shield is selectively positionable from a non-covering...http://www.google.com.au/patents/US4917673?utm_source=gb-gplus-sharePatent US4917673 - Assembly for the protection against inadvertent puncture by medical needles
