US 725,605, System Of Signaling
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: 1903 April 14
container: label: Container
content: Box 5, Folder 2
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials