|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 = '285') AND (category.subclass = '55') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '285'; Subclass is '55';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||518,793||April 24, 1894||Lightning Rod and Coupling
Couple with internal threads to screw sections together
|SMITH, John W.
||Lightning Rod Coupling|
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