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US Patent: 438,848
Sheet-Metal Pliers
Patentee:
Nelson B. Keyes (exact or similar names) - Unionville, CT

USPTO Classifications:
74/523, 81/420

Tool Categories:
pliers

Assignees:
None

Manufacturer:
Nelson B. Keyes - Unionville, CT
Bridgeport Manufacturing Co. - Bridgeport, CT

Witnesses:
Lillian D. Kelsey
J. H. Shumway
W. A. Hitchcock
Julia Boyle

Patent Dates:
Applied: Aug. 29, 1890
Granted: Oct. 21, 1890

Patent Pictures: [ 1 | 2 ]
Nelson B. Keyes patent October 21, 1890
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KEYES PATENT PLIERS and NIPPERS (1896 writeup) - FLICKR
Description:
The gripping jaw faces are at right angle to the plane of the handle; the specifications indicate the same principle could be used to form "round-nose" pliers.

A "heavy sheet metal" 5-inch long pliers marked "PAT OCT 21 86" matches this patent; Nelson B. Keyes was noted as a pliers and nippers manufacturer in 1893 issues of IRON AGE. An announcement in the August 8, 1896 issue of the CHICAGO JOURNAL OF COMMERCE notes Bridgeport Mfg. Co. was producing the KEYES Patent Pliers, wire cutters, and champagne nippers.

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