- De Forest Patent 2,594,740
The memo outlines the reasons Beckman should not undertake development of Lee de Forest's light amplifier.
This letter suggests Beckman might be interested in commercial development of de Forest's new invention, a "sandwich, non-vacuous, light amplifier."
U.S. Patent 2,594,740, filed on behalf of Lee de Forest and William A. Rhodes, describes a device for amplifying the intensity of radiation.
Lee de Forest (1873–1961) was an inventor, most notably of Audion vacuum…