Piezoelectric crystal device, #2,170,318
name: label: Collection Creator
content: Cady, Walter Guyton, 1874-1973 (physicist)
setName: label: See more items in
content: Walter Guyton Cady Papers
label: See more items in
content: Walter Guyton Cady Papers / Series 8: Patent Records
unitdate: label: Date
content: 1939
container: label: Container
content: Box 50, Folder 18
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials