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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 = '920') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '411'; Subclass is '920';

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T / S Patent Date Description Patentee Category Assigned To
 1889
U 401,343 April 16, 1889 Electric Wire Nail
U-shaped wire nail that is round at the top to protect the wooden covering over the wire. (see article 12125)		 GILDEMEYER, Charles A.
 Nail 1/2 to Madison Rush
 1941
U 2,237,717 April 8, 1941 Insulator Structure
Wireholder with multiple grooves and lag screw		 STEWART, Lory B.
STEWART, Alvin J.
 Wireholder 1/3 to Karl Thielscher

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