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US Patent: 163,341
Improvement in devices for connecting, holding, and punching sections of sheet-metal pipe
Patentee: Melvin Stephens (exact or similar names) - Brooklyn, NY USPTO Classifications: 29/263, 29/564 Tool Categories: metalworking machines : sheet metal Assignees: None Manufacturer: Not known to have been produced Witnesses: George T. Pinckney Harold Serrell	Patent Dates: Applied: Feb. 24, 1874 Granted: May 18, 1875 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Stephens Patent Vise Co.

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