|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 = '238') AND (category.subclass = '14.4') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '238'; Subclass is '14.4';
View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.
|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||979,015||December 20, 1910||Rail Joint
Joint to connect rails to improve signal communication
|LOCKE, Louis P.
Total of 0.02 seconds