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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 = '513') ORDER BY date ASC, patent, type

Total of 2 patents found where: Class is '411'; Subclass is '513';

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T / S Patent Date Description Patentee Category Assigned To
 1923
U 1,458,811 June 12, 1923 Insulator Connector
Link for Hewlett suspension disk (see 1,633,399)		 ECKERT, Grandon E.
 Suspension The R. Thomas & Sons Co.
 1931
U 1,819,380 August 18, 1931 Insulator Connection
Suspension insulator cap and pin that can be locked in securely		 OSBORNE, David H.
 Suspension Locke Insulator Corp.

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