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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 = '524') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '174'; Subclass is '524';

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T / S Patent Date Description Patentee Category Assigned To
 1918
U 1,280,172 October 1, 1918 Insulator Protector
Protective shield surrounding the insulator to protect it from damage.		 CULLIGAN, Charles A.
 Protective Shield  

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