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US Patent: 1,224,272
Unloader for Air Compressors
Patentee: William H. Callan (exact or similar names) - Franklin, Venango County, PA USPTO Classifications: 137/102, 251/28 Tool Categories: industrial machines : pneumatic : air compressors Assignees: Chicago Pneumatic Tool Co. - Chicago, IL Manufacturer: Not known to have been produced Witnesses: Wayne W. Blakeley Lee H. Wright Marlin H. Olsen Robert Dobberman	Patent Dates: Applied: Mar. 08, 1915 Granted: May 01, 1917 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Chicago Pneumatic Tool Co.

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