Ford has registered the "Mach 4" trademark, fueling rumors about a four-door Mustang. Is a new era for the iconic pony car on the horizon?

The company recently filed to trademark the ‘Mach 4’ name in the United States. Last year, Ford reportedly showed dealers a sketch of a possible four-door Mustang. The idea of an extended Mustang lineup isn’t exactly a groundbreaking concept.

Ford recently applied to trademark the Mach 4 name. This development suggests that the rumoured 4-door Mustang sedan may be in the works. The application was filed with the United States Patent and Trademark

A new trademark filing from Ford suggests the much-rumored four-door Mustang may indeed be in the works. Uncovered by Ford Authority, the Blue Oval recently submitted paperwork to trademark “Mach 4.” The February 25 application with the United States Patent and Trademark Office (USPTO) states that its usage is for “motor vehicles,