| 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';
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| T / S | Patent | Date | Description | Patentee | Category | Assigned To |
| 1880 | ||||||
| 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. |
Transposition | |
| 1884 | ||||||
| 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. |
Lightning Arrestor | |
| 1889 | ||||||
| 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. |
| 1893 | ||||||
| U | 506,002 | October 3, 1893 | Insulating Support for Metallic Circuits Oil cup insulator to support short crossarm for two insulators |
COUSENS, Alfred C. |
Oil | Charles Stone |
| 1915 | ||||||
| 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. |
| 1940 | ||||||
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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