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US Patent: 1,389,731
Chuck
Patentee:
Wendell A. Barker (exact or similar names) - Elkhart, IN

USPTO Classifications:
279/114, 279/118, 411/999

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

Assignees:
None

Manufacturer:
Thomas Elevator Co. - Chicago, IL

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 05, 1919
Granted: Sep. 06, 1921

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Thomas Elevator Co.
Description:
Improvements to patent 1,249,300.

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