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Patents for William Alfred Pearn
Patents 16 - 20 of 20
First set of recordsPrevious set of recordsLast set of records
NumberDatePatenteeTitleType
GB-212,965Mar. 17, 1924W.A. PearnImprovements relating to boring, facing and like machineshorizontal boring mills
GB-213,952Apr. 15, 1924W.A. PearnImprovements relating to boring, facing and like machineshorizontal boring mills
GB-214,329Apr. 22, 1924W.A. PearnImprovements relating to boring, facing and like machineshorizontal boring mills
GB-220,904Aug. 28, 1924W.A. PearnImprovements relating to boring, facing and like machineshorizontal boring mills
GB-237,679Aug. 06, 1925W.A. PearnImprovements relating to grinding and like machines or attachmentshorizontal boring mills
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