U.S. patents 400,001-500,000
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 4: Patents and Patent Abstracts re: Coffee Processing
unitdate: label: Date
content: 1889 - 1893
container: label: Container
content: Box 6, Folder 1
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials