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US Patent: 391,161
Tap
Patentee: Henrik Kelstad (exact or similar names) - Minneapolis, MN USPTO Classifications: 408/156 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: R. H. Sanford C. L. Nachtrieb	Patent Dates: Applied: Jun. 29, 1888 Granted: Oct. 16, 1888 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen.
Description: Tap with adjustable diameter of cut due to split construction and a set screw.

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