Air Tunnel
A means of sending trains through the air.

Through the Air Tunnel (1929)

Aircab
A flying autonomous taxi cab.

The Barrier (1934)

Atomic Percolator
Make coffee with radiation.

The Golden Girl of Munan (1928)

Beam Car
A vehicle like an elevator car, but which travels on a radio and magnetic beam, from the surface of a planet up to a satellite.

Lost City of Mars (1934)

Flame Pistol
A hand-held weapon that incinerates opponents.

Invisible Ships (1931)

Flame Projector
Handheld device shoots flame.

Water-Bound World (1932)

Gateway
A device that opens a portal to another dimension.

Wanderer of Infinity (1933)

General Strike of the Robots
All over the world, robots cease their labors.

Rex (1934)

Harvest Power From Stray Energy
A means of collecting enough energy from stray electronic impulses to power a device.

The Golden Girl of Munan (1928)

Levitators
Allows free flight in the interior volume of a vast sphere in space.

Lost City of Mars (1934)

Metallic Fingers
Robot fingers.

Rex (1934)

Neutralizing Wall
A barrier that stops electrical and mechanical vibrations, rendering the protected area effectively invisible.

The Golden Girl of Munan (1928)

Optophone (Opto)
A video call system.

Too Many Boards! (1931)

Polyceltron Iconoscope Televisor
A portable camera and microphone setup that could broadcast on-the-spot news.

Newscast (1939)

Ray-Pistol
An early version of the raygun.

The War of the Planets (1929)

Robot Skin Covering
Realistic covering for the bodies of robots.

Rex (1934)

Robot-Control Wave Band
Special command circuit for robots.

Rex (1934)

Robot-Surgeon
A perfect robot for perfected human beings.

Rex (1934)

Rocket Float
A sea-going floating platform for rocket launches.

Too Many Boards! (1931)

Self-Aware Robot
A robot that thinks and reasons for itself.

Rex (1934)