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US Patent: 1,024,656
Boring Bar
Patentee: Isaac W. Sprink (exact or similar names) - Oak Park, IL USPTO Classifications: 408/168 Tool Categories: Assignees: Armstrong Bros. Tool Co. - Chicago, IL Manufacturer: Not known to have been produced Witnesses: F. R. Scherffins John H. Elischer Robert N. Weir Arthur W. Carlson	Patent Dates: Applied: Jun. 16, 1909 Granted: Apr. 30, 1912 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens Armstrong Brothers Tool Co. history "Vintage Machinery" entry for Armstrong Brothers Tool Co.
Description: Luther L. Miller - patent attorney

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