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Image / Thermionic vacuum tube type CM 2185

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Title
Thermionic vacuum tube type CM 2185
Creator
Federal Telegraph Company
Date Created and/or Issued
1925-1945
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
Patent no. 1615023, No. E186. Vacuum and filament intact.
Type
Image
Identifier
41DE47C5-3A15-45C5-823B-364526150556
2003-1-678
Subject
Vacuum-tubes (LCSH)
Federal Telegraph Company

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