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US Patent: 80,583
Improvement in screw-drivers
Patentee:
Isaac Allard - Belfast, ME

USPTO Classifications:
74/127

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers

Assignees:
Isaac Allard - Belfast, ME
Frank A. Howard - Belfast, ME

Manufacturer:
F. A. Howard & Son - Belfast, ME

Witnesses:
A. D. Chase
Timothy Chase

Patent Dates:
Granted: Aug. 04, 1868

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Howard Manufacturing Co.
Description:
Information taken from Clifford D. Fales' database.

Earliest patent for a spiral screwdriver. This patent appears on some ALLARD/HOWARD models that also show 11/24/1874—(patent 157,087) and 03/01/1892 (patent 470,001) but 1868 patent features are not incorporated; see patent 157,087 and patent 470,001.

Marked, "F. A. Howard /—Maker—/ Belfast, Me. / Allard's Pat. Aug. 4, 1868 / Nov. 24. 1874" or "F. A. Howard /- Maker—/ Belfast, Me. / Pat'd / Aug. 4, 68 / Nov. 24. 74 / Mar. 1, 92"

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