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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 = '248') AND (category.subclass = '219.2') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '248'; Subclass is '219.2';

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T / S Patent Date Description Patentee Category Assigned To
 1926
U 1,590,381 June 29, 1926 Insulator Cap
Iron insulator cap cemented to top of insulator to support electrical equipment		 KERR, Benjamin W.
 Cap Railway and Industrial Engineering Co.
 1929
U 1,738,875 December 10, 1929 Insulator Pin
Wooden pin strengthened with a metal collar		 DUFFY, Ralph E.
 Pin  

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