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US Patent: 994,457
Variable Diameter Brace-Bit for Boring Wood
Patentee:
George William Green (exact or similar names) - Bobin, New South Wales, Australia

USPTO Classifications:
408/26, 82/1.5

Tool Categories:
woodworking tools : hand drills : drill bits : adjustable drill bits

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
W. J. Davis
M. J. Candiup

Patent Dates:
Applied: Aug. 04, 1910
Granted: Jun. 06, 1911

Patent Pictures:
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