US 447,920, Method of Operating ARC Lamps
name: label: Collection Creator
content: Pickard, Greenleaf Whittier, 1877-1956
setName: label: See more items in
content: Greenleaf Pickard Notebooks and Nikola Tesla Patents
label: See more items in
content: Greenleaf Pickard Notebooks and Nikola Tesla Patents / Series 2: Nikola Tesla Patents
unitdate: label: Date
content: 1891 March 10
container: label: Container
content: Box 5, Folder 1
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials