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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 = '104') AND (category.subclass = '235') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '104'; Subclass is '235';

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T / S Patent Date Description Patentee Category Assigned To
 1891
U 445,008 January 20, 1891 Insulator
Protective shield for trolley hanger insulator		 VOGLER, William
 Protective Shield  

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