|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 = '74') AND (category.subclass = '574') ORDER BY date ASC, patent, type|
Total of 1 patents found where: Class is '74'; Subclass is '574';
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||474,319||May 3, 1892||Insulator
|GOODRICH, Charles F.
||Strain||1/2 to John G. Thompson|
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