|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 = '174') AND (category.subclass = '121R') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '174'; Subclass is '121R';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||51,935||January 9, 1866||Improvement in Insulating Telegraph Wires
Paraffin and rubber insulated wire
|ELY, Alfred B.
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