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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 = '197') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '174'; Subclass is '197';

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T / S Patent Date Description Patentee Category Assigned To
 1890
U Specimen known 427,296 May 6, 1890 Insulator
CD 141.8 and CD 1037, self-tying with tapered pin hole & clamping flange		 BUZBY, Joseph F.
 Insulator  
 1920
U 1,361,948 December 14, 1920 Insulator
Pin with spring wire extending beyond edge of bottom pin hole		 WIDMYER, James L.
 Pin  

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