1
William N Eldridge: Blood sampling assembly having porous vent means vein entry indicator. Becton Dickinson and Company, Kane Dalsimer Kane Sullivan and Kurucz, June 17, 1980: US04207870 (282 worldwide citation)

A blood sampling assembly is provided which has a cannula designed for intravenous penetration, a mechanism for applying negative pressure to the cannula, a chamber located between the cannula and the source of negative pressure, a one-way valve positioned within the chamber, and a venting member wi ...


2
William N Eldridge: Fluid flow control device for use with an evacuated blood collection container. Becton Dickinson and Company, October 18, 1983: US04409991 (10 worldwide citation)

A fluid flow control device for use with an evacuated blood collection container comprises a substantially rigid body. Two needle cannulae are connected to the body with a space therebetween. A resilient, collapsible passage member lies in the space and connects the two cannulae in fluid communicati ...


3
William N Eldridge: Fluid flow control device for use with an evacuated blood collection container. Becton Dickinson and Company, Richard J Rodrick, March 16, 1982: US04319582 (2 worldwide citation)

A fluid flow control device for use with an evacuated blood collection container comprises a substantially rigid body. Two needle cannulae are connected to the body with a space therebetween. A resilient, collapsible passage member lies in the space and connects the two cannulae in fluid communicati ...