The 1929 Flying Wing
In 1929, Avion built an almost all-wing aircraft. It wasn't quite a flying wing, as there were conventional tail surfaces located on booms behind the wing. Being his first flying wing project, Northrop had decided to go the belt-and -suspenders route for adequate control and safety.
The wingspan was 30' 6", and featured a 90 horsepower Monasco four-cylinder air-cooled engine buried inside the wing.
The first flight occurred at Muroc Dry lake (Now Edwards Air Force Base) in 1929. The design quickly proved that it had easy handling qualities and performed extremely well compared to other planes in the same power rating.
The airplane was modified several times, and in various configurations it had a pusher/tractor propellor, and one/two seats.
I cannot find any details on what became of the craft.