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US Patent: 456,258
Drill for Drilling Square Holes
Patentees:
David Brown Hutton (exact or similar names) - Essex, Essex County, England
Archibald Frederick George Daniels (exact or similar names) - Essex, Essex County, England

USPTO Classifications:
407/54, 408/227, 82/1.3

Tool Categories:
metalworking machines : drilling and boring : drill bits

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 03, 1891
Granted: Jul. 21, 1891

Patent Pictures:
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