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US Patent: 2,923,306
Pressure regulator valve mechanism for air tools
Patentee: Walter G. Mitchell (exact or similar names) - Aurora, IL USPTO Classifications: 137/491, 415/145, 415/147, 415/904 Tool Categories: Assignees: Thor Power Tool Co. - Aurora, IL Manufacturer: Thor Power Tool Co. - Aurora, IL Witnesses: Unknown	Patent Dates: Applied: Jan. 07, 1957 Granted: Feb. 02, 1960 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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