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US Patent: 139,149
Improvement in Saw Filing Machines
Patentee: Charles F. Henis (exact or similar names) - Baltimore, MD USPTO Classifications: 76/31, 76/78.1 Tool Categories: woodworking tools : handsaws : saw sharpening tools Assignees: None Manufacturer: Not known to have been produced Witnesses: Melville Church N. K. Ellsworth	Patent Dates: Applied: Oct. 21, 1872 Granted: May 20, 1873 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen.
Description: Combination file holder and clamping apparatus.

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