Patent Extracts of E.R. Johnson by G.H. Clark
name: label: Collection Creator
content: Clark, George Howard, 1881-1956
setName: label: See more items in
content: George H. Clark Radioana Collection
label: See more items in
content: George H. Clark Radioana Collection / Series 125: Radio Patents and Patent Practices
unitdate: label: Date
content: 1900
container: label: Container
content: Box 375, Folder 4
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials