|SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Spring') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Category is 'Spring';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||415,504||November 19, 1889||Insulator
Insulator with internal spring to hold tension on the wire
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