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 = '501') AND (category.subclass = '118') ORDER BY patent DESC, type |
Total of 1 patents found where: Class is '501'; Subclass is '118';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1906 | ||||||
U | 816,270 | March 27, 1906 | Refractory Material for Electric Insulation and Other Purposes Insulating material made of steatite and water glass known as artificial lava |
STEWARD, Demetrius M. |
Misc |
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