Hammer's Patent: Selenium Cells #888,802
- Collection Creator
- Hammer, William J. (William Joseph), 1858-1934 (electrical engineer)
- See more items in
- William J. Hammer Collection
- William J. Hammer Collection / Series 1: William J. Hammer Papers / 1.7: Patent Materials
- Date
- Sep. 17, 1907
- Container
- Box 21, Folder 9
- Archival Repository
- Archives Center, National Museum of American History
- Type
- Archival materials
- 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.
