Any time you think what you seen in your world experience is new, you should probably sit back and think again. Few things are new. Most things are just repeated visits to old idea’s. Sometimes the technology has changed making something simpler or better.
The VZ-7 flew from 1958 to 1960, however it failed to meet with Army standards and was returned to the the company. Apparently you can see this machine at the the Fort Rucker United States Army Aviation Museum.
I wonder when the description “Quad-Copter” was coined?
Wiki page on: Curtiss-Wright VZ-7
Another blog artical with more information on this subject: Strange Vehicles: Curtiss-Wright VZ-7