Ted Dabney game. As "Pong" became successful, Dabney felt overshadowed by both Bushnell and Alcorn. He learned that Bushnell had patented his video circuit idea without including Dabney on the patent. Bushnell also had assigned Dabney a lower-level position in Atari and did not include him in high-level meetings. Around March 1973, Dabney left the company over this falling out, selling his portion of the company's ownership for . Dabney did continue to help Bushnell with starting his Pizza Time Theater (the predecessor of Chuck E. Cheese's) and Catalyst Technologies as an employee, being wary of Bushnell's previous treatment of him. Alongside
History of video games Sega Enterprises's "Periscope" (1967) and Chicago Coin's "Speedway" (1969) pioneered the adoption of elaborate visual displays and electronic sound effects in the amusement arcade. Consequently, when a recent engineering graduate from Utah with experience running coin-operated equipment named Nolan Bushnell first saw "Spacewar!" at SAIL in late 1969 or early 1970, he resolved to build a coin-operated version for public consumption. Enlisting the aid of an older and more experienced engineer named Ted Dabney, Bushnell built a variant of the game called "Computer Space" in which a single player-controlled spaceship dueled two hardware-controlled flying saucers. Released in late November or