|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 = '256') AND (category.subclass = '6') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '256'; Subclass is '6';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||289,076||November 27, 1883||Lightning Conductor
Lightning rod made of twisted copper or iron rods with points along the length similar to barbed wire
|DODGE, Thomas D.
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