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US Patent: 21,628
Improvement in riddles for threshing-machines
Patentee: Francis W. Robinson (exact or similar names) - Richmond, IN USPTO Classifications: 209/397 Tool Categories: agricultural : threshers and thrashers Assignees: None Manufacturer: Robinson & Co. - Richmond, IN Robinson Machine Works - Richmond, IN Witnesses: R. A. Howard S. C. Mendenhall	Patent Dates: Granted: Sep. 28, 1858 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Robinson & Co.

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