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US Patent: 1,819,837
Chuck
Patentee:
Wilbur C. De Graff (exact or similar names) - Cleveland, OH

USPTO Classifications:
279/106, 279/34, 82/142, 82/147

Tool Categories:
metalworking machines : metal lathes : metal lathe chucks

Assignees:
Warner & Swasey Co. - Cleveland, OH

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Apr. 28, 1928
Granted: Aug. 18, 1931

Patent Pictures:
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Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Warner & Swasey Co.

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