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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 = '338') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '338';

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T / S Patent Date Description Patentee Category Assigned To
 1928
U 1,661,823 March 6, 1928 Insulator
Suspension string with insulators having conducting surface to balance electrical field		 HAWLEY, Kent A.
 Suspension Locke Insulator Corp.

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