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 = '431') AND (category.subclass = '175') ORDER BY date ASC, patent, type |
Total of 1 patents found where: Class is '431'; Subclass is '175';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1872 | ||||||
U | 128,914 | July 9, 1872 | Improvement in Apparatus for Burning Hydrocarbons as fuel Glass furnace for burning gas |
RUSSELL, William H. |
Furnace | James M. Brookfield |
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