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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '86') AND (category.subclass = '20.12') ORDER BY last_name ASC, first_name, date, patent, type

Total of 1 patents found where: Class is '86'; Subclass is '20.12';

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T / S Patent Date Description Patentee Category Assigned To
 LOCKE, Fred M.
U 716,343 December 16, 1902 Machine for Forming the Interiors of Plastic Materials
Press for making porcelain insulators
LOCKE, Fred M.
Press  

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