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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 = '403') AND (category.subclass = '280') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '403'; Subclass is '280';

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T / S Patent Date Description Patentee Category Assigned To
 1870
U Specimen known 105,834 July 26, 1870 Improvement in Telegraph Insulators
Pin hole tapered with grooves to receive wedged, split-end pin		 OAKMAN, Samuel
 Pin  

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