|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') ORDER BY date ASC, patent, type|
Total of 3 patents found where: Class is '238';
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.
|U||1,147,498||July 20, 1915||Divided Insulator
|FREEMAN, Edgar H.
||Knob||Trenton Porcelain Co.|
|U||1,556,570||October 6, 1925||Impregnated Wood and Process of Treating Wood
Treating wood pins and the like under high temperature with Montan wax and a solvent that penetrates the grain and protects it from weather and decay
|COOLIDGE, Joseph R.
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