|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 = '335') ORDER BY date ASC, patent, type|
Total of 2 patents found where: Class is '335';
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||69,585||October 8, 1867||Improvement in Telegraph Apparatus
|POND, C. H.
|U||512,656||January 9, 1894||Relay
Method of making a telegraph relay more responsive
|LOCKE, Fred M.
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