|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 = '15') AND (category.subclass = '173') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '15'; Subclass is '173';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||90,578||May 25, 1869||Improvement in Lightning Rod Couplings
Coupling for lightning rods where the ends can be screwed together (see reissue 8,304)
|REYBURN, William S.
HUNTER, Edmund A. W.
|Lightning Rod Coupling|
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