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US Patent: 419,111
Insulated Nippers
Improvements in Insulated Nippers and Cutting-Instruments
Patentee:
Firmin Michael Casey - Mount Vernon, NY

USPTO Classifications:
16/431, 30/341, 403/23, 81/427.5

Tool Categories:
pliers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
William Miller
Edward Wolff
Thomas F. Hunt
J. Van Santvoord

Patent Dates:
Applied: Oct. 24, 1889
Granted: Jan. 07, 1890

Patent Pictures:
Firmin M. Casey patent January 7, 1890
USPTO pdf tiff
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Description:
Handle insulation of rubber coating over a non-conducting vitreous layer (as patented by Casey in pat. no. 409,097).

The drawing shows this double layer coating applied to side-cutter flat jaw pliers. The handles have ridges to retain the non-conducting coatings, and end knobs to give extra purchase for the hands.

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