Radio tubes, World War I aircraft transmitter, excerpts from Hammer's notebook describing "phantom shadows" and a radio exhibit
- Collection Creator
- Hammer, William J. (William Joseph), 1858-1934 (electrical engineer)
- See more items in
- William J. Hammer Collection
- William J. Hammer Collection / Series 4: Photographs / 4.3: Reference Materials
- Date
- undated
- Container
- Box 110, Folder 3
- Archival Repository
- Archives Center, National Museum of American History
- Type
- Archival materials
- Negatives
- Collection Citation
- William J. Hammer Collection, Archives Center, National Museum of American History
- Collection Rights
- Collection items available for reproduction, but the Archives Center makes no guarantees concerning copyright restrictions. Other intellectual property rights may apply. Archives Center cost-recovery and use fees may apply when requesting reproductions.
- Collection Restrictions
- Collection is open for research.
