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US Patent: 455,993
Lifting-jack
Patentee:
Josiah Barrett (exact or similar names) - Allegheny, PA

USPTO Classifications:
254/110

Tool Categories:
metalworking tools : lifting jacks

Assignees:
Duff Mfg. Co., Ltd. - Allegheny, PA

Manufacturer:
Duff Mfg. Co., Ltd. - Allegheny, PA

Witnesses:
J. N. Cooke
Robert D. Totten

Patent Dates:
Applied: Feb. 13, 1891
Granted: Jul. 14, 1891

Patent Pictures:
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Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Duff Mfg. Co.
Description:
This patent provides an alternative mechanism for the jack shown in patent 312,316.

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