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US Patent: 757,494
Expansion Boring Tool
Patentee: William Pohlman (exact or similar names) - Middletown, Orange County, NY USPTO Classifications: 408/116, 408/158 Tool Categories: metalworking machines : drilling and boring : boring heads Assignees: None Manufacturer: Wellman Co. - Medford, Middlesex County, MA Witnesses: Willis H. Davis Irving G. Downs P. H. Minshull Walter Tunnell	Patent Dates: Applied: Feb. 19, 1903 Granted: Apr. 19, 1904 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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