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US Patent: 958,112
Boring-Tool
Patentees:
Thomas S. Halliwell (exact or similar names) - Denver, CO
Henry B. Maschmeier (exact or similar names) - Denver, CO

USPTO Classifications:
24/568, 408/206, 408/232

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Chris Evans
John Vaslie

Patent Dates:
Applied: Dec. 14, 1909
Granted: May 17, 1910

Patent Pictures:
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