Image / Charles Herrold's notes on the invention of the water-cooled microphone

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Title: Charles Herrold's notes on the invention of the water-cooled microphone
Date Created and/or Issued: 1913/ /
Contributing Institution: History San Jose Research Library
Collection: History San Jose Online Catalog
Rights Information: Please contact the contributing institution for more information regarding the copyright status of this object.
Description: Herrold's handwritten notes and drawings, developing the water-cooled microphone, dated March 1913.
Type: image
Identifier: BE77006E-5E87-46EC-BC19-376178808727
L2009-3-8
Subject: Inventors
Inventions
Microphones
Radio--History (LCSH)
Herrold, Charles

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