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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 = '16') AND (category.subclass = '441') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '16'; Subclass is '441';

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T / S Patent Date Description Patentee Category Assigned To
 1948
U 2,434,391 January 13, 1948 Fence Knob
Bracket for electric fence insulator that is strong and easily attached to wooden post without damaging the post. Bracket has two spikes that secure it to the post.		 BUSSMANN, Aloysius B.
 Fence  

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