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US Patent: 143,473
Improvement in machines for punching sheet metal
Patentee: Melvin Stephens (exact or similar names) - Brooklyn, NY USPTO Classifications: 279/91, 403/342, 83/133, 83/389 Tool Categories: metalworking machines : metal punching machines Assignees: None Manufacturer: Not known to have been produced Witnesses: Charles H. Smith George T. Pinckney	Patent Dates: Applied: Jun. 13, 1873 Granted: Oct. 07, 1873 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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