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GB Patent: GB-190,602,917
Improvements relating to mortising machines Converting between hollow-chisel and chain mortisers
Patentee: William Blackett Haigh (exact or similar names) - Oldham, England USPTO Classifications: Tool Categories: woodworking machines : joint making machines : mortising machines woodworking machines : wood drilling and boring : mortising machines Assignees: W. B. Haigh & Co., Ltd. - Oldham, England Manufacturer: W. B. Haigh & Co., Ltd. - Oldham, England Witnesses: Unknown	Patent Dates: Applied: Feb. 06, 1906 Granted: May 31, 1906 Patent Pictures: Espacenet patent Report data errors or omissions to steward Jeff Joslin "Vintage Machinery" entry for W. B. Haigh & Co., Ltd.

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