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US Patent: 1,424,764
Surface Grinder
Patentee:
Carroll Knowles (exact or similar names) - Hartford, Hartford County, CT

USPTO Classifications:
451/18, 451/287, 451/294

Tool Categories:
metalworking machines : grinders : surface grinders

Assignees:
Pratt & Whitney Co. - Hartford, Hartford County, CT

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 07, 1921
Granted: Aug. 08, 1922

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Pratt, Whitney & Co.

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