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US Patent: 503,292
Metal Plate Folding Machine
Patentees: William F. Niedringhaus (exact or similar names) - St. Louis, MO Charles A. Wettengel (exact or similar names) - St. Louis, MO USPTO Classifications: 72/383, 72/450 Tool Categories: metalworking machines : metal bending machines Assignees: St. Louis Stamping Co. - St. Louis, MO Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 21, 1892 Granted: Aug. 15, 1893 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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