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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Self-tying') ORDER BY date ASC, patent, type

Total of 1 patents found where: Category is 'Self-tying';

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T / S	Patent	Date	Description	Patentee	Category	Assigned To
		1921
U	1,384,214	July 12, 1921	Insulator Self-tying by means of an upper and lower cylindrical block fitted into a hole and secured with a screw plug.	SANDS, Richard	Self-tying

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