|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 = '313') AND (category.subclass = '147') ORDER BY date ASC, patent, type|
Total of 3 patents found where: Class is '313'; Subclass is '147';
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||1,099,421||June 9, 1914||High Voltage Switch
High voltage switch mounted on multipart insulators composed of triangle shaped metal rods and insulators that rotate to open or close the switch.
|BURKE, Alfred Woodard
|U||1,127,043||February 2, 1915||Electric Arc Extinguisher
Use of explosive to break the arcing around a multipart insulator (see 1,116,303)
|LOCKE, Fred M.
|U||2,011,136||August 13, 1935||Protective Apparatus
Arcing gap using flux control insulators
|AUSTIN, Arthur O.
||Arc Gap||The Ohio Brass Co.|
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