| 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 |
| 1914 | ||||||
| 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 |
Switch | |
| 1915 | ||||||
| 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. |
Transmission | |
| 1935 | ||||||
| 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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