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US Patent: 2,774,292
Earth conditioning device
Patentee: Eric Hartmann (exact or similar names) - Syracuse, NY USPTO Classifications: 172/40, 172/41, 451/357 Tool Categories: Assignees: Porter-Cable Machine Co. - Syracuse, NY Manufacturer: Porter-Cable Machine Co. - Syracuse, NY Witnesses: Unknown	Patent Dates: Applied: Apr. 28, 1954 Granted: Dec. 18, 1956 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Porter-Cable Machine Co.

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