Chase's R&D division

Chase R&D is a Division of Constantine Chase's self run pre-war company in the untied states.

Chase R&D was the company that invented the drug Psycho, and has appeared in every Fallout game except Fallout: Brotherhood of Steel.

Mentions
Chase's R&D company does not appear in any of the games, but is mentioned in a holotape titled Psycho in the Fallout 3 add-on Operation: Anchorage, but it's product Psycho appears in every game except Fallout: BOS.