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US Patent: 400,116
Work Holder
Patentee: Isaac N. Roberts (exact or similar names) - Norristown, Montgomery County, PA USPTO Classifications: 82/162 Tool Categories: metalworking machines : metal lathes : metal lathe accessories and attachments woodworking machines : wood lathes : wood lathe accessories Assignees: Mary A. Roberts - Norristown, Montgomery County, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 20, 1888 Granted: Mar. 26, 1889 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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