Since December of last year, Google has purchased at least six companies either buildings robots or creating technologies used in the development of robotics.

Former Google Android lead and current Google Robot Guru Andy Rubin's list of acquired companies reads a bit like a baseline robot kit:

Redwood Robotics for robot arms

Holomni for robot wheels

Bot & Dolly for robotics cameras

Boston Dynamics for creepy and cool mobile robots

DeepMind Technologies for artificial intelligence

Meka Robotics for humanoid robots