|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 = '427') AND (category.subclass = '279') ORDER BY date ASC, patent, type|
Total of 2 patents found where: Class is '427'; Subclass is '279';
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||1,784,392||December 9, 1930||Manufacture of Insulators
Suspension insulator with glazed sanded surfaces to improve strength of cap
|ROWLAND, Davidge H.
||Suspension||Locke Insulator Corp.|
|U||1,987,683||January 15, 1935||Insulator
RFI: coat crown with copper glaze to prevent AM radio interference
|HUNT, Marsden H.
BARROW, George M.
|RFI||Westinghouse Electric & Mfg. Co.|
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