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 = '92') ORDER BY description ASC, date, patent, type |
Total of 1 patents found where: Class is '138'; Subclass is '92';
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T / S | Patent | Date | Description | Patentee | Category | Assigned To |
1874 | ||||||
U | 154,638 | September 1, 1874 | Improvement in Casting Stench Traps Method of casting lead S-traps |
BROOKE, Homer |
Misc |
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