|SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Rough') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Category is 'Rough';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||129,724||July 23, 1872||Improvement in Insulators for Telegraphic Uses
Roughened lower surface of insulator to retain patented coating mixture
|FARMER, Moses G.
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