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US Patent: 168,412
Improvement in cranes
Patentee:
Francis A. Pratt (exact or similar names) - Hartford, CT

USPTO Classifications:
212/230

Tool Categories:
construction machines : cranes

Assignees:
Pratt & Whitney Co. - Hartford, CT

Manufacturer:
Pratt, Whitney & Co. - Hartford, CT

Witnesses:
Theodore G. Ellis
Wendell R. Curtis

Patent Dates:
Applied: Mar. 10, 1875
Granted: Oct. 05, 1875

Patent Pictures:
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Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Pratt & Whitney Co.
Description:
Seen on an old Pratt & Whitney milling machine.

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