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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 = '238') AND (category.subclass = '14.4') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '238'; Subclass is '14.4';

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T / S Patent Date Description Patentee Category Assigned To
 1910
U 979,015 December 20, 1910 Rail Joint
Joint to connect rails to improve signal communication		 LOCKE, Louis P.
 Rail  

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