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US Patent: 1,399,388
Belt-shifter
Patentee: Emerald E. Jones (exact or similar names) - Chicago, IL USPTO Classifications: 474/124, 474/127 Tool Categories: industrial machines : industrial machine mechanisms : industrial machine pulleys and belt drive mechanisms Assignees: Surty Guard Co. - Chicago, IL Manufacturer: Surty Guard Co. - Chicago, IL Witnesses: B. G. Richards Joshua R. H. Potts	Patent Dates: Applied: Jan. 22, 1921 Granted: Dec. 06, 1921 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Surty Guard Co.
Description: Of interest because the assignee made a notable machinery guard. Improvements to patent 1,161,775.

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