The hoverpad was invented and also mass produced by the Machines inside their city of 01 and was distributed to humans around the globe. It was a completely new technology which took the world by storm as it practically eliminated the need for wheeled and winged transportation. The humans used these hoverpads in their hover-car and stratospheric bomber production lines.
Hoverpads are an integral part in hovercraft flight. Military grade hover pads are of a tougher and beefier design allowing them to stay functional after many hits and hard-knocks, this proves to be useful when travelling through old underground sewer and city networks.