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US Patent: 379,213
Screw Tap
Patentees: Edwin Firth (exact or similar names) - Troy, Rensselaer County, NY Albert Tompkins (exact or similar names) - Troy, Rensselaer County, NY Ira Tompkins (exact or similar names) - Troy, Rensselaer County, NY USPTO Classifications: 408/224, 470/198 Tool Categories: metalworking tools : taps and dies Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 01, 1887 Granted: Mar. 13, 1888 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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