Siemens-Schuckert

Future development of saucer armament focused more on the more promising avenue of energy beam weapons.

And we've got the Realtron, developed from a particle accelerator developed by Max Steenbeck at Siemens-Schuckert in the late 1930s.

Similar to the Metatron, developed by Donald Kirst at the University of Illinois in 1940.

Both devices produced high-energy electron streams, but the German project was the first to weaponize that effect.