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

Total of 1 patents found where: Category is 'Tree Insulator';

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T / S Patent Date Description Patentee Category Assigned To
U 1,937,764 December 5, 1933 Insulator
Self-tying tree insulator with mounting lag screw and convoluted metal wire clip cemented in the porcelain insulator designed such that the insulator is turned to allow the conductor to be dropped in the slot between the ends of the wire clip and then the insulator is turned 90 degrees to secure the condutor in the wire clip.
KYLE, William D.
Tree Insulator Line Material Co.

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