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Subject Light amplifiers Remove constraint Subject: Light amplifiers

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    • 1953-Jan-07

    In this letter, Beckman declines to develop de Forest's light amplifier.

    • De Forest Patent 2,594,740
    • 1952-Nov-24

    The memo outlines the reasons Beckman should not undertake development of Lee de Forest's light amplifier.

    • 1952-Nov-19

    This letter suggests Beckman might be interested in commercial development of de Forest's new invention, a "sandwich, non-vacuous, light amplifier."

    • 1952-Apr-29

    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…