|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 = '411') AND (category.subclass = '338') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '411'; Subclass is '338';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||607,315||July 12, 1898||Insulator
Wall tube of two split pieces [Scientific American 8-6-1898]
|WINGARD, Charles L.
||Wall Tube||1/2 to Luella Wingard|
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