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US Patent: 1,591,540
Crank-case venting means for pneumatic tools
Patentees: Axel Levedahl (exact or similar names) - Aurora, IL Reinhold A. Norling (exact or similar names) - Aurora, IL USPTO Classifications: 184/55.1, 184/6, 74/603, 74/605, 92/78, 92/82 Tool Categories: Assignees: None Manufacturer: Independent Pneumatic Tool Co. - Aurora, IL Witnesses: Unknown	Patent Dates: Applied: Nov. 08, 1923 Granted: Jul. 06, 1926 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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