After publishing an article for the January 1961 issue of the magazine 'Electronics World', Moog sold around a 1000 Theremin kits from 1961 to 63 out of a three room apartment. Eventually he decided to begin producing instruments of his own design. After toying with the idea of a portable guitar amplifier, Moog turned to the synthesiser.
After the success of Carlos's album "Switched on Bach", entirely recorded using Moog synthesisers, Moog's instruments made the first leap from the electronic avant garde, into commercial popular music. The Beatles bought one, as did Mick Jagger who bought a hugely expensive modular Moog in 1967 (unfortunately this instruments was only used once, as a prop on a film set and was later sold to the German experimentalist rockers, Tangerine Dream).
Though setting a future standard for analogue synthesiser, the Moog Synthesiser Company did not survive the decade, larger companies such as Arp and Roland developed Moog's protoypes into more sophisticated and cost effective instruments. Robert Moog has returned to his roots and currently runs 'Big Briar' a company specialising in transistorised version of the Theremin Moog Production Models