Author:Charles Reginald Underhill

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Charles R. Underhill
(1877–1947)

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Inventor and writer from the United States

Works

Books

Wireless Telegraphy and Telephony; Popularity Explained (1908) (transcription project)

Patents

Receiving telegraph instrument (2 August 1904)
Telegraph System (25 August 1914) (transcription project)
Brake Mechanism (8 July 1919) (transcription project)
Controlling Mechanism (25 October 1921)

Some or all works by this author were published before January 1, 1929, and are in the public domain worldwide because the author died at least 100 years ago. Translations or editions published later may be copyrighted. Posthumous works may be copyrighted based on how long they have been published in certain countries and areas.

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