|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 = '393') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '425'; Subclass is '393';
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|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||1,471,907||October 23, 1923||Machine for Heading Porcelain Tubes and the Like
Machine to make porcelain wall tubes
|MASON, Albert G.
BUCKLEY, Lorenzo C.
|Wall Tube||The R. Thomas & Sons Co.|
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