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US Patent: 2,438,239
Ball Grinding Machine
Patentee:
Harry A. Toulmin, Jr. (exact or similar names) - Dayton, Montgomery County, OH

USPTO Classifications:
451/189, 451/2, 451/50

Tool Categories:
metalworking machines : grinding machines

Assignees:
Thompson Grinder Co. - Springfield, Clark County, OH

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 23, 1946
Granted: Mar. 23, 1948
Antedated: Jul. 23, 1946

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

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