Parkhill Manufacturing Co. Canadian patents and related materials
name: label: Collection Creator
content: Simmons Company
setName: label: See more items in
content: The Simmons Company Records
label: See more items in
content: The Simmons Company Records / Series 1: Corporate Materials / 1.8: Patents
unitdate: label: Date
content: 1917
container: label: Container
content: Box 42, Folder 10-11
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials