Optical accessory for pianos
name: label: Collection Creator
content: Bickley, Everett H., 1888-1972
setName: label: See more items in
content: Everett H. Bickley Collection
label: See more items in
content: Everett H. Bickley Collection / Series 4: Other Inventions / 4.2: Inventions
unitdate: label: Date
content: 1943
container: label: Container
content: Box 14, Folder 8
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials