Pistons, i.e. cylindrical bodies that sit inside the syringe barrel, typically with

Official title: {Pistons, i.e. cylindrical bodies that sit inside the syringe barrel, typically with an air tight seal, and slide in the barrel to create a vacuum or to expel blood}

A61B5/150236 (Pistons, i.e. cylindrical bodies that sit inside the syringe barrel, typically with) appears on 474 US grants and 453 published applications in this corpus.