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US Patent: 1,798,481
Ratchet lever
Edward Henry Peterson - Chicago, IL
Norris F. McNaught - Chicago, IL

USPTO Classifications:
74/145, 81/58.5

Tool Categories:
wrenches : ratchet wrenches

Duro Metal Products Co. - Chicago, IL

Duro Metal Products Co. - Chicago, IL

none listed

Patent Dates:
Applied: Oct. 08, 1928
Granted: Mar. 31, 1931

Patent Pictures: [ 1 | 2 ]
Edward H. Peterson and Norris F. McNaught patent March 31, 1931
USPTO pdf tiff
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The ratchet driver that cites this patent uses the second form shown in the drawings. It was used as the driver handle in some DURO socket sets.

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