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Patents for Matthew Henry Royston
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
GB-198,118May 31, 1923M.H. RoystonImprovements in machinery for cleaning out, cutting or enlarging ditchestracks
GB-215,675May 15, 1924M.H. RoystonImprovements relating to scrapers for disc ploughsplows
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