Liberty Prime (with help of General Atomics)
RobCo Industries was a pre-war company in the Fallout Universe. They were responsible for the creation of Pip-Boys for citizens of Vaults. The company specialized in robotics and technology.
RobCo teamed up with Vault-Tec to help create vaults and General Atomics to create robots such as Liberty Prime and the Protectron. It is stated over the intercom of Vault 101 in Fallout 3 that The Vault-Tec/RobCo partnership is considered the most successful venture in the history of American industry.