Patent: Knotting Mechanism for Spiral-Spring Forming Machines: Silvio Barsanti: 2504792, 18 April 1950
name: label: Collection Creator
content: Simmons Company
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content: The Simmons Company Records
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content: The Simmons Company Records / Series 1: Corporate Materials / 1.8: Patents
container: label: Container
content: Box 44, Folder 8
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials