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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 = '335') AND (category.subclass = '181') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '335'; Subclass is '181';

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T / S Patent Date Description Patentee Category Assigned To
 1867
U 69,585 October 8, 1867 Improvement in Telegraph Apparatus
Telegraph
POND, C. H.
Telegraph  

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