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US Patent: 1,835,687
Backing-Off Mechanism for Grinding Machines
Patentee:
Harvey M. Allison (exact or similar names) - Worcester, Worcester County, MA

USPTO Classifications:
451/222, 451/374

Tool Categories:
metalworking machines : grinders : grinding attachments

Assignees:
John Bath - Worcester, Worcester County, MA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 27, 1931
Granted: Dec. 08, 1931

Patent Pictures:
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