|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 = '403') AND (category.subclass = '296') ORDER BY date ASC, patent, type|
Total of 2 patents found where: Class is '403'; Subclass is '296';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||196,235||October 16, 1877||Improvement in Lightning Rods
Lightning rod made with a spirally fluted tubular core with one or more smaller tubular wires wrapped around in the fluted depressions with coupling having a male thread on each end to screw into end of rod which has female threads
|KNAPP, George S.
|U||938,137||October 26, 1909||Lightning Rod
Lightning rod coupling not made of copper but maintaining a copper contact
|GOETZ, Julius F.
||Lightning Rod Coupling|
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