In my industry, EPI is Electro Plasma Incorporated (they were in California), which was consumed by the company I formerly worked for (Sulzer Metco; currently Oerlikon Metco). They (EPI) made vacuum plasma systems and in those chambers made tungsten rocket nozzles, among tons of other things.
Vacuum chamber production was moved to Switzerland, where I worked with one for a while. I believe the only documented use of cold spray in a vacuum chamber, ever (on this planet anyway).
No, you don't get those 30 seconds of wasted life reading all that, back.