Duper Company

 Only mentioned in the The Armageddon Rag, Duper seems to be a medical supplier that produces its well-known stimpaks and, in Project V13, Super Duper stimpaks.

Background
The company was mentioned in reference to the Super Duper stimpaks as having Duper Company's logo upon it. 

Appearances
Duper Company is mentioned in The Armageddon Rag, Vol. 4 under Crazy Ivan's New and Used Guns.

Products from the Duper company were to appear in Fallout Online, Interplay's original Project V13, since abandoned in favor of an unrelated project by the same name.