SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '138') AND (category.subclass = '177') ORDER BY specimen DESC, date, patent, type |
Total of 1 patents found where: Class is '138'; Subclass is '177';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1887 | ||||||
U | 361,759 | April 26, 1887 | Composition for Pipes, Artificial Stone, etc. Composition formula of Gilsonite |
GILSON, Samuel H. |
Composition | 1/2 to George Goss, Sr. |
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