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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '411') AND (category.subclass = '508') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '411'; Subclass is '508';

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T / S Patent Date Description Patentee Category Assigned To
U 684,909 October 22, 1901 Insulating Bushing
COLE, John A.
U 912,364 February 16, 1909 Insulator for Electrically Charges Wires
Tube for routing wires through wood with spring clip attached to the outside of the tube to prevent the tube from slipping out.
CONRAD, Stonewall Jackson
Wall Tube  
U 1,026,711 May 21, 1912 Sheet Metal Insulator Pin
Pin, metal composed of three flat strips
SHOVER, Barton R.

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