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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 = '517') ORDER BY date ASC, patent, type

Total of 3 patents found where: Class is '411'; Subclass is '517';

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T / S Patent Date Description Patentee Category Assigned To
 1904
U 773,733 November 1, 1904 Insulator
Wall tube with ribs and metal clip
GREENE, Leon W.
Wall Tube  
 1913
U 1,080,257 December 2, 1913 Insulator
Wall tube with metal clip
BRUCHSALER, Karl
Wall Tube  
 1929
U 1,738,188 December 3, 1929 Insulating Support
Suspension cap, pin and connector
LANYON, Samuel Herbert
Suspension Lapp Insulator Co.

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