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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
FOWLER, George

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