In 1950s he worked next desk to Bernard Cousino, who invented the endless tape loop, using it at first on an open reel.
[3][4] Working for a promotion company, in 1952 Eash rented a desk in the office of Bernhard Cousino's Electronic Workshop, Toledo (Ohio).
In 1961 Eash moved to Van Nuys, a northern suburb of Los Angeles, where Earl "Madman" Muntz operated some of his business.
The judge stated Eash's patent filed in 1954 was an obvious modification of the Mohawk Message Repeater.
William "Bill" Lear benefited from this judgement by getting a clear patent situation for this 8-Track cartridge system.