|SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Relay') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Category is 'Relay';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||512,656||January 9, 1894||Relay
Method of making a telegraph relay more responsive
|LOCKE, Fred M.
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