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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 = '381') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '16'; Subclass is '381';

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T / S Patent Date Description Patentee Category Assigned To
 1909
U 912,364 February 16, 1909 Insulator for Electrically Charges Wires
Tube for routing wires through wood with spring clip attached to the outside of the tube to prevent the tube from slipping out.		 CONRAD, Stonewall Jackson
 Wall Tube  

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