Inventor

Wilhelm B Gruber

Patents indexed

Year range

1940

Associated with

Years active

1940

Total patents

Most recent

1940

Domains

consumer_electronicsmechanical

Activity by decade

1940s

Patents

Career timeline

1 patents, in 1940

Dot size = forward citations

Hover or tap any dot to see the patent. Larger dots indicate more forward citations — a proxy for downstream influence.

How the View-Master 3D Image Viewer Works

A 1939 invention for a handheld device that uses two offset images to create the illusion of depth, famously known as the View-Master.

Patent monitoring

Get a weekly digest when new patents naming Wilhelm B Gruber are indexed.