PlanetZ forums - scopeusers.com

For a bit of research I'm doing, here, it states Studio Electronics (well known for their rack mounted versions of classic synths) was founded in 1981.

https://en.wikipedia.org/wiki/Studio_Electronics

But here, under 'About' - https://www.uaudio.com/about/ - it claims "Bill Putnam, a natural entrepreneur, started three audio product companies during his long career: Universal Audio, Studio Electronics, and UREI." And that apparently happened in late 1950's when Putnam was persuaded to establish a studio in LA and move from Chicago.

Studio Electronic Inc is a service and repair company based in Burbank and run by Dave Kulka see studioelectronics.biz

They specialise in high end studio gear like AMS Marshall Electronics EMT etc

Good microphones too.
My son bought a mic pre IIRC called Red and we argued about the company.
Then I showed him the Code8 I never use and he realized they were both real companys.