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US Patent: 513,931
Jewel Chuck
Patentee:
John L. Hutchinson (exact or similar names) - La Porte, La Porte County, IN

USPTO Classifications:
279/51

Tool Categories:
metalworking machines : metal lathes : metal lathe chucks
metalworking machines : metal lathes : watchmakers lathes
trade specific : watchmaker

Assignees:
None

Manufacturer:
Unknown

Witnesses:
H. C. Shannon
W. C. Armers

Patent Dates:
Applied: Mar. 17, 1893
Granted: Jan. 30, 1894

Patent Pictures: [ 1 | 2 ]
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Description:
Sample, 6 jewel chucks in wooden case all marked ,'Pat. Jan. 30,94.'

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