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US Patent: 19,928
Wheelwright's machine Hub-boring machine
Patentee: Samuel Holl (exact or similar names) - Reading, PA USPTO Classifications: 144/15, 144/206, 144/278.1, 144/99, 5/51.1 Tool Categories: metalworking machines : drilling and boring Assignees: None Manufacturer: Not known to have been produced Witnesses: G. S. Kinsey Matthias Mengel	Patent Dates: Granted: Apr. 13, 1858 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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