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US Patent: 215,744
Improvement in Augers
Auger Bit with Detachable Tip
Patentee:
William Heyn (exact or similar names) - San Francisco, CA

USPTO Classifications:
408/214, 408/241R

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
J. H. Tingmon
Oscar A. Tolle

Patent Dates:
Applied: Oct. 28, 1878
Granted: May 27, 1879

Patent Pictures:
USPTO (New site tip)
Google Patents
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