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US Patent: 2,231,233
Process of finishing materials
Patentee:
Henry Vienhaus (exact or similar names) - Springfield, OH

USPTO Classifications:
106/169.15, 106/169.19, 427/292, 427/388.1, 427/407.1, 427/429

Tool Categories:
metalworking machines

Assignees:
None

Manufacturer:
Thompson Grinder Co. - Springfield, OH

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 14, 1939
Granted: Feb. 11, 1941

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Thompson Grinder Co.
Description:
This patent number was listed on a Thompson Grinder Co. machine plaque.

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