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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Pin/mine') ORDER BY date ASC, patent, type

Total of 1 patents found where: Category is 'Pin/mine';

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T / S Patent Date Description Patentee Category Assigned To
U 1,163,132 December 7, 1915 Insulator Pin
Insulator pin with two shanks that are driven into the mine ceiling or wall at right angles to each other in order to more securely hold the insulator.
ETTE, Charles G.
Pin/mine St. Louis Malleable Casting Co.

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