US Patent: AI279 - Hollow Auger


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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:

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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.