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US Patent: 1,234,334
Brake mechanism for lifting-jacks
Patentee:
Isaiah E. Hindman - Bellevue, PA

USPTO Classifications:
188/187, 188/75, 254/103

Tool Categories:
trade specific : automobile mechanic

Assignees:
Duff Manufacturing Co. - Pittsburgh, PA

Manufacturer:
Duff Manufacturing Co. - Pittsburgh, PA

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 02, 1917
Granted: Jul. 24, 1917

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

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