Piezo-electric system, #1,977,169
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: 1934
container: label: Container
content: Box 50, Folder 15
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials