United States Patent office, N.Y., Interference No.27,074, William J. Hammer's sworn statement re. the tungsten Filament
name: label: Collection Creator
content: Hammer, William J. (William Joseph), 1858-1934 (electrical engineer)
setName: label: See more items in
content: William J. Hammer Collection
label: See more items in
content: William J. Hammer Collection / Series 2: Edisonia / 2.5: Menlo Park; Electric Train; Incandescence / Writings about the light bulb in Menlo Park
unitdate: label: Date
content: Oct. 18, 1907
container: label: Container
content: Box 27, Folder 5
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials