|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 = '307') ORDER BY date ASC, patent, type|
Total of 6 patents found where: Class is '307';
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||224,580||February 17, 1880||Induced Current Guard for Electrical Conductors
Pre-transposition technique to eliminate induced current on telephone and telegraph wires
|CHINNOCK, Charles E.
|U||304,084||August 26, 1884||Device for Protection Electric Light Systems from Lightning
Method of protecting electric generators from lightning by allowing the charge to discharge to the earth ground
|EDISON, Thomas A.
|U||414,943||November 12, 1889||Method of Utilizing Natural Electric Energy
Method of capturing electric energy from lightning rods and storing in a battery
|DEWEY, Mark W.
||Lightning Energy||The Dewey Corp.|
|U||506,002||October 3, 1893||Insulating Support for Metallic Circuits
Oil cup insulator to support short crossarm for two insulators
|COUSENS, Alfred C.
|U||1,132,281||March 16, 1915||Reactive Coil
Odd arrangement for a choke coil around Hewlett fish-tail strain insulators.
|MOODY, Walter S.
||Coil||General Electric Co.|
|U||2,195,986||April 2, 1940||Transmission Line Transposition
Transposition block (flat) for short wave radio antenna made of Faradite
|GODDARD, DeWitt Rugg
||Transposition||Radio Corporation of America|
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