1
Norma A Sampson, Earl W Sampson: Shielded needle. Dolores A Smith, Weissenberger and Peterson, March 4, 1986: US04573976 (311 worldwide citation)

An apparatus for injecting a substance into a human or animal comprising a body adapted to have the substance to be injected pass therethrough, a needle mounted on the body and a needle guard mounted on the body between an extended position in which the guard obstructs access to the point of the nee ...


2
Norma A Sampson, Earl W Sampson: Shielded hypodermic syringe. Gordon L Peterson, January 10, 1984: US04425120 (299 worldwide citation)

A hypodermic syringe comprising a barrel, a needle coupled to the barrel and terminating in a point and a needle guard mounted on the barrel for movement between an extended position in which the guard shields the needle and a retracted position in which the guard does not shield the needle. The gua ...