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Patents for John George William Gruban
Patents 1 - 3 of 3
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
GB-191,016,698Jun. 15, 1911J.G. GrubanImprovements woodworking machinery
GB-191,100,392Sep. 14, 1911J.G. GrubanImprovements relating to wood mortising machines
GB-191,102,960Dec. 21, 1911J.G. GrubanImprovements in wood moulding, planing and like machines
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