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US Patent: 1,052,921
Lifting-jack
Patentee:
Isaiah E. Hindman (exact or similar names) - Crafton, PA

USPTO Classifications:
254/103, 74/724

Tool Categories:

Assignees:
Duff Mfg. Co. - Pittsburgh, PA

Manufacturer:
Duff Mfg. Co. - Pittsburgh, PA

Witnesses:
George B. Bleming
Jesse B. Heller

Patent Dates:
Applied: Sep. 06, 1912
Granted: Feb. 11, 1913

Patent Pictures:
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Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Duff Mfg. Co.

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