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US Patent: 1,107,611
Lever-socket for lifting-jacks
Patentee:
Isaiah E. Hindman - Crafton, PA

USPTO Classifications:
74/159

Tool Categories:
trade specific : automobile mechanic

Assignees:
Duff Manufacturing Co. - Pittsburgh, PA

Manufacturer:
Duff Manufacturing Co. - Pittsburgh, PA

Witnesses:
George B. Bleming
R. A. Balderson

Patent Dates:
Applied: Aug. 14, 1912
Granted: Aug. 18, 1914

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Duff Manufacturing Co.

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