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US Patent: 1,991,337
Dust separating apparatus
Patentee: John C. Smith (exact or similar names) - Cincinnati, OH USPTO Classifications: 29/DIG.078, 29/DIG.083, 451/456, 55/406, 55/433 Tool Categories: Assignees: United States Electrical Tool Co. - Cincinnati, OH Manufacturer: United States Electrical Tool Co. - Cincinnati, OH Witnesses: Unknown	Patent Dates: Applied: Feb. 25, 1933 Granted: Feb. 12, 1935 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for United States Electrical Tool Co.

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