4,151,989 Patent Certificate of Correction
name: label: Collection Creator
content: Ehrat, Arthur
label: Collection Creator
content: Fleckner, John A., 1941-
setName: label: See more items in
content: Arthur Ehrat Papers
label: See more items in
content: Arthur Ehrat Papers / Series 6: Toby Dittrich Files / 6.2: Patent Information
unitdate: label: Date
content: 1979 May 1
container: label: Container
content: Box 20, Folder 2
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials