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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 = '174') AND (category.subclass = '138G') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '174'; Subclass is '138G';

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T / S Patent Date Description Patentee Category Assigned To
 1893
D 22,876 November 7, 1893 Design for an Insulator
Square flat insulator with large center hole and small hole in each corner		 WRIGHT, Augustus
 Misc  

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