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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 = '525') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '525';

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T / S Patent Date Description Patentee Category Assigned To
 1851
U Specimen known 8,075 May 6, 1851 Improvement in the Manufacture of India Rubber
Rubber - vulcanizing process for hard rubber for insulator		 GOODYEAR, Nelson
 Rubber  

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