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US Patent: 1,978,181
Hydraulically driven surface grinding machine
Patentee:
Joseph R. Whittles (exact or similar names) - Rockford, IL

USPTO Classifications:
451/213, 451/24, 451/395

Tool Categories:
metalworking machines : grinders : surface grinders

Assignees:
Norton Co. - Worcester, MA

Manufacturer:
Thompson Grinder Co. - Springfield, OH
Norton Co. - Worcester, MA

Witnesses:
Unknown

Patent Dates:
Applied: Dec. 30, 1930
Granted: Oct. 23, 1934

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Norton Co.
Vintage Machinery entry for Thompson Grinder Co.

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