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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 = '425') AND (category.subclass = '340') ORDER BY date ASC, patent, type

Total of 1 patents found where: Class is '425'; Subclass is '340';

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T / S Patent Date Description Patentee Category Assigned To
 1923
U 1,469,584 October 2, 1923 Tube Forming Machine
Machine for making porcelain wall tubes		 CASE, Francis M.
 Wall Tube Federal Porcelain Co.

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