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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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