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GB Patent: GB-138,467
Improvements relating to wood mortising machines Turret-head hollow-chisel and chain-cutter mortiser
Patentee: William Blackett Haigh (exact or similar names) - Manchester, England USPTO Classifications: Tool Categories: woodworking machines : joint making machines : mortising machines woodworking machines : wood drilling and boring : mortising machines Assignees: Oliver Machinery Co. (UK) - Manchester, England Manufacturer: Oliver Machinery Co. (UK) - Manchester, England Witnesses: Unknown	Patent Dates: Applied: Mar. 15, 1919 Granted: Feb. 12, 1920 Patent Pictures: Espacenet patent Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Oliver Machinery Co. (UK)
Description: The William Blackett Haigh who founded W. B. Haigh & Co. lived 1820-1883. The inventor of this patent was perhaps a grandson.

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