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US Patent: 2,561,753
Change-Speed Drive for Machine Tool Spindles
Patentees:
William Wallace Potter - Pawtucket, Providence County, RI
Alfred Joseph Fuller - Pawtucket, Providence County, RI

USPTO Classifications:
74/325, 74/333

Tool Categories:
metalworking machines : metalworking machine mechanisms

Assignees:
Niles-Bement-Pond Co. - West Hartford, CT

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: May 26, 1944
Granted: Jul. 24, 1951

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Niles-Bement-Pond Co.

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