Larry Page isn't the only one trying to make 'flying cars' a reality

US Patent and Trademark Office

An early patent of Zee.Aero's aircraft.

A "flying car" prototype developed by Zee.Aero, the company Google co-founder Larry Page has been funding, was spotted in the wild last week, according to a report Monday in the Monterey Herald.

Witnesses in Hollister, California reportedly saw the vertical take-off plane hover about 25 feet above the ground, land, and then hover again. Many are referring to planes of this nature as flying cars because of their ability to take off vertically, which allows them to be stowed in driveways.

Zee.Aero isn't the only company interested in vertical take-off planes - here are 5 others.