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US Patent: 390,605
Screw Jack
Patentee: Jacob O. Joyce (exact or similar names) - Dayton, Montgomery County, OH USPTO Classifications: 101/378, 254/102 Tool Categories: material handling : jack screws Assignees: None Manufacturer: Joyce, Cridland & Co. - Dayton, Montgomery County, OH Witnesses: Unknown	Patent Dates: Applied: May 03, 1888 Granted: Oct. 02, 1888 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Joyce, Cridland & Co.

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