SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Rough') ORDER BY type ASC, date, patent |
Total of 1 patents found where: Category is 'Rough';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1872 | ||||||
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. |
Rough |
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