Category:Hush-A-Phone
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According to "The Master Switch" by Tim Wu, Knopf, pages 99-114, 2010, ISBN 978-0-307-26993-5, this device was invented and patented by Dr. Leo Beranek and defended at the FCC by Beranek and J. C. R. Licklider. This book includes a photograph of Dr. Beranek with the device.
Media in category "Hush-A-Phone"
The following 4 files are in this category, out of 4 total.
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Alan ILO 1927 195A.jpg 1,139 × 951; 408 KB
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Hush-a-Phone item.jpg 4,032 × 3,024; 2.05 MB
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Hush-a-phone pedestal model.jpg 2,588 × 3,888; 3.31 MB
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