US Patent: RE72 - Improvement in machinery for manufacturing double-twist screw-augers


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US Patent: RE72

Improvement in machinery for manufacturing double-twist screw-augers

Patentee:

Ezra L'Hommedieu (exact or similar names) - Chester, CT

USPTO Classifications:

172/754, 76/102, 76/2

Tool Categories:

metalworking machines : drilling and boring : drill bits

woodworking machines : specialty woodworking machines : tool making machines

woodworking tools : hand drills : drill bits

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Stephen L'Hommedieu

John C. Palmer

Patent Dates:
Granted:	Jul. 30, 1845

Reissue Information:
Reissue of 851 (Jul. 24, 1838)

Patent Pictures:

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Description:

The original patent was issued jointly to Ezra L'Hommedieu and Richard N. Watrous, but this reissue notes that Watrous had assigned all his rights to L'Hommedieu.