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US Patent: 647,311
Boring implement
Patentees:
William T. Maxwell (exact or similar names) - Baltimore, MD
George J. Spahn (exact or similar names) - Baltimore, MD

USPTO Classifications:
408/137, 81/34

Tool Categories:
woodworking tools : hand drills

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Jno. P. Lewis
Joseph Rysanck
Patent Dates:
Applied: Jul. 08, 1899
Granted: Apr. 10, 1900

Patent Pictures:
Maxwell/Spahn 647,311
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Steve Gosselin (GL)
Description:
This is a bevel geared brace attachment designed for drilling joists.

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