Oberheim is an American synthesizer manufacturer founded in 1969 by Tom Oberheim. History and products. Tom Oberheim founded the company in 1969, originally as a designer and contract manufacturer of electronic effects devices for Maestro, including the PS-1A Phase Shifter and RM-1 Ring Modulator, and briefly a retail dealer for ARP Instruments. The company's first product released under its own name was the Oberheim DS-2, one of the first digital music sequencers.
https://en.wikipedia.org/wiki/Oberheim_Electronics