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US Patent: 1,396,391
Power-operated compressor
Patentees: Charles W. Frees (exact or similar names) - St. Louis, MO Frank Ackerman (exact or similar names) - St. Louis, MO USPTO Classifications: 417/294, 417/298, 73/494 Tool Categories: industrial machines : pneumatic : air compressors Assignees: Curtis & Co. Mfg. Co. - Wellston, MO Manufacturer: Curtis Mfg. Co. - Wellston, MO Witnesses: Unknown	Patent Dates: Applied: Jun. 21, 1920 Granted: Nov. 08, 1921 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Curtis & Co. Mfg. Co.

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