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US Patent: 1,835,733
Backing Off Mechanism for Grinding Machines
Patentees:
Ernest A. Walker (exact or similar names) - Worcester, Worcester County, MA
Harvey M. Allison (exact or similar names) - Worcester, Worcester County, MA

USPTO Classifications:
451/142, 451/374, 82/149

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: Jul. 27, 1929
Granted: Dec. 08, 1931

Patent Pictures:
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