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US Patent: AI279
Hollow Auger
Patentee:
Mahlon Gregg (exact or similar names) - Philadelphia, PA

USPTO Classifications:
30/495

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: May 15, 1860

Reissue Information:
Reissue of 19,292 (Feb. 09, 1858)

Patent Pictures:
USPTO (New site tip)
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Description:
The primary purpose of this "Additional Improvement" patent is to provide a drawing of the hollow auger intended to be used with Gregg's Machine for Cutting Tenons on Spokes. The original patent, number 19292, was issued February 9, 1858.

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