|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 = '249') AND (category.subclass = '57') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '249'; Subclass is '57';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||1,733,729||October 29, 1929||Method of Casting Link-Type Insulators
Manufacturing method to cast Hewlett type suspension disks
|GOUVERNEUR, Minor F. H.
STEVENS, Frank J.
|Manufacturing||Locke Insulator Corp.|
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