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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 = '332') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '238'; Subclass is '332';

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T / S Patent Date Description Patentee Category Assigned To
 1915
U Specimen known 1,147,498 July 20, 1915 Divided Insulator
Reversible nail-knob		 FREEMAN, Edgar H.
 Knob Trenton Porcelain Co.

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