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GB Patent: GB-390,622
Improvements in or Relating to Cylinder Honing Devices
Patentee: Hall Mfg. Co. (exact or similar names) - Toledo, Lucas County, OH USPTO Classifications: Tool Categories: trade specific : vehicle repairer : vehicle mechanic : cylinder maintenance Assignees: Hall Manufacturing Co. - Toledo, Lucas County, OH Manufacturer: Hall Manufacturing Co. - Toledo, Lucas County, OH Witnesses: Unknown	Patent Dates: Applied: Feb. 25, 1932 Granted: Apr. 13, 1933 Patent Pictures: Espacenet patent Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Hall Manufacturing Co.

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