Patents (3,718,772; 4,006,737; 4,073,011)
name: label: Collection Inventor
content: Del Mar, Bruce E., 1913-
setName: label: See more items in
content: Del Mar Avionics Holter Monitor Records
label: See more items in
content: Del Mar Avionics Holter Monitor Records / Series 3: Patents and Trademarks
unitdate: label: Date
content: 1973, 1977, 1978
container: label: Container
content: Box 2, Folder 12
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials