|SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Signal') ORDER BY patent DESC, type|
Total of 1 patents found where: Category is 'Signal';
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||1,003,143||September 12, 1911||Electric Signaling Apparatus
Improved signaling of railways
|LOCKE, Louis P.
Total of 0.01 seconds