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US Patent: 427,325
Boring-machine
Patentees: Charles H. Irwin (exact or similar names) - Wilmington, OH Friederich Mill (exact or similar names) - Wilmington, OH John E. Hitch (exact or similar names) - Wilmington, OH USPTO Classifications: 144/106, 408/111, 74/333 Tool Categories: woodworking machines : joint making machines : portable timber mortisers woodworking machines : wood drilling and boring : portable timber mortisers Assignees: Charles H. Irwin - Wilmington, OH Manufacturer: Not known to have been produced Witnesses: Levi Mills Horace Spray	Patent Dates: Applied: Dec. 28, 1889 Granted: May 06, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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