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US Patent: 477,159
Power Hammer
Patentees:
James B. Sweeney (exact or similar names) - St. Johnsbury, Caledonia County, VT
Robert B. Laird (exact or similar names) - St. Johnsbury, Caledonia County, VT

USPTO Classifications:
72/450, 74/25

Tool Categories:
metalworking machines : forging machines
trade specific : blacksmith

Assignees:
None

Manufacturer:
Laird & Sweeney Mfg. Co. - St. Johnsbury, Caledonia County, VT

Witnesses:
Frank Stafford
Wendell P. Stafford
Charles Nider
C. Sedgwick

Patent Dates:
Applied: Jul. 21, 1891
Granted: Jun. 14, 1892

Patent Pictures:
USPTO (New site tip)
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Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Laird & Sweeney Mfg. Co.

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