US Patent for "a method and apparatus for preparing recorded program material to render detectable unauthorized magnetic tape duplications, and method and apparatus for detecting such duplications"
name: label: Collection Creator
content: Cook Labs
label: Collection Creator
content: Cook, Emory, 1913-2002
setName: label: See more items in
content: Cook Labs records
label: See more items in
content: Cook Labs records / Series 1: Business Papers / Cook Inventions, Folder 2 of 2
unitdate: label: Date
content: 1978 April 25
container: label: Container
content: Box 1, Folder 19
dataSource: label: Archival Repository
content: Ralph Rinzler Folklife Archives and Collections
identifier: label: Identifier
content: CFCH.COOK, Item COOK-019-10
objectType: label: Type
content: Archival materials