U.S. Patents: non numbered, 150 cards
name: label: Collection Author
content: Trigg, Charles W., 1898-1989 (chemist)
setName: label: See more items in
content: Charles W. Trigg Papers
label: See more items in
content: Charles W. Trigg Papers / Series 6: Trigg Card File
unitdate: label: Date
content: 1922 - 1937
container: label: Container
content: Box 12
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials