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US Patent: 2,478,696
Toggle Lever Operated Pliers With Pivoted Jaw Piece
Louis E. Isele - Watertown, CT

USPTO Classifications:
81/380, 81/424, 81/94

Tool Categories:
wrenches : pliers type wrenches : locking pliers

Seymour Smith And Son - Oakville, CT

Seymour Smith And Son - Oakville, CT

none listed

Patent Dates:
Applied: Aug. 23, 1944
Granted: Aug. 09, 1949

Patent Pictures:
Louis E. Isele patent August 9, 1949
USPTO pdf tiff
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The toggle leverage locks. The movable jaw has a pivoted jaw piece. The handle portions have grooves to "enhance frictional grip."

The specifications cite patent nos. 449,250, 1,489,458, 1,561,833, 1,680,956, 2,211,507, 2,299,454, 2,341,489, and 2,385,654 as references.

The patent matches the SEYMOUR SMITH SNAP-LOCK locking pliers; patent no. 2,598,650 is a later enhancement.

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