To list every single one would not be feasible. As for types, some of the types invented after 1920 include..
General Purpose Machine Guns
Guided Missiles
Assault Rifles
The modern tank
Personal Defense Weapons (PDWs)
Grenade launchers
Anti-tank rockets and missiles
Jet aircraft
Helicopter gunships
The theremin was invented in 1920.
they where invented in the 1920's:D
it was invented in 1920:) :) :) :) :) :) :)
No, it was invented in 1909.
in 1920
1920
cave men the first weapons were rocks
ugg boots were invented in 1920.
Band-Aid was invented in 1920.
The band aid was invented in 1920 by Earl Dickinson. The exact month and day in 1920 that he invented the Band-Aid is unknown.
1920
1920