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US Patent: 411,055
Saw-tooth swage
Patentees: Alvin D. Porter (exact or similar names) - Grand Rapids, MI C. Oscar Porter (exact or similar names) - Grand Rapids, MI USPTO Classifications: 76/52 Tool Categories: metalworking machines : grinders : sharpening machines : saw sharpening machines woodworking tools : handsaws : saw sharpening tools : saw swages Assignees: None Manufacturer: C. O. & A. D. Porter Co. - Grand Rapids, MI Witnesses: L. V. Moulton Dennis L. Rogers	Patent Dates: Applied: Jan. 28, 1889 Granted: Sep. 17, 1889 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for C. O. & A. D. Porter

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