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US Patent: 1,486,976
Machine for compressing corrugated pipes
Patentee: Bror J. Lindgren (exact or similar names) - Buffalo, NY USPTO Classifications: 72/359, 72/441, 72/469 Tool Categories: Assignees: Niagara Machine & Tool Works - Buffalo, NY Manufacturer: Niagara Machine & Tool Works - Buffalo, NY Witnesses: Unknown	Patent Dates: Applied: Mar. 24, 1922 Granted: Mar. 18, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Niagara Machine & Tool Works

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