Who invented the insulin syringe?

That credit goes to Colin Murdoch who invented the modern day plastic disposable syringe in the 1950s. (along with child proof medicine containers and the tranquillizer gun).

It is often claimed that an African American (Phil Brooks) invented the first disposable syringe. This claim is incorrect and may be influenced by a desire to promote notable African Americans. Brooks' syringe is by no means the modern day plastic disposable syringe that everyone is familiar with. In fact, it looks nothing like the one we're used to.

It can rightly be claimed that Brooks was the first person to receive a US Patent for a disposable syringe. This claim needs to be seen in the wider context that is not the syringe we are familiar with and that the US is not the only country in the world to issue patents and earlier patents were issued in other countries.