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US Patent: 40,651
Improved asphaltic paving or flag stone
Patentees: Abraham Straub (exact or similar names) - Milton, PA Isaac Straub (exact or similar names) - Cincinnati, OH USPTO Classifications: 106/284 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: R. T. Campbell E. Schaferr	Patent Dates: Granted: Nov. 17, 1863 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Isaac Straub & Co.

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