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US Patent: 2,990,032
Separator for use with rock drills
Patentee: Robert L. Sandvig (exact or similar names) - Whittier, CA USPTO Classifications: 55/323, 55/325, 55/337, 55/356, 55/429, 55/447, 55/459.1, 55/498, 96/415 Tool Categories: specialty machines : separators Assignees: Thor Power Tool Co. - Aurora, IL Manufacturer: Thor Power Tool Co. - Aurora, IL Witnesses: Unknown	Patent Dates: Applied: Aug. 19, 1958 Granted: Jun. 27, 1961 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Thor Power Tool Co.

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