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
Charles B Mitchell: Shielded needle. Dolores A Smith, Norma A Sampson, Earl W Sampson, Gordon L Peterson, December 23, 1986: US04631057 (276 worldwide citation)

An apparatus for injecting a substance into a human or animal comprising a body, a needle coupled to the body and terminating in a point and a needle guard mounted on the body for movement from a retracted position in which the guard does not shield the needle to an extended position in which the gu ...