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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)
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