Hearing Aids. Patents
setName: label: See more items in
content: Disability Reference Collection
label: See more items in
content: Disability Reference Collection / Series 2: Hearing
unitdate: label: Date
content: 1878 - 1895
label: Date
content: undated
container: label: Container
content: Box 9, Folder 4
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials