| 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 = '331') ORDER BY date ASC, patent, type |
Total of 6 patents found where: Class is '313'; Subclass is '331';
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| T / S | Patent | Date | Description | Patentee | Category | Assigned To |
| 1867 | ||||||
U  |
63,206 | March 26, 1867 | Improvement in Insulators for Telegraph Wires Hook encased in metal or wood allows arcing to ground |
BROOKS, David |
Hook | |
| 1911 | ||||||
| U | 1,010,181 | November 28, 1911 | Electric Cable Protector Protective shield mounted on top of the insulator to support the conductor. |
SANDFORD, JR., Joseph Addison |
Protective Shield | The R. Thomas & Sons Co. |
| 1918 | ||||||
| U | 1,273,015 | July 16, 1918 | Electric Insulator Suspension made of several parts bolted together |
THOMAS, Percy H. |
Suspension | |
| U | 1,277,304 | August 27, 1918 | Metal Protected High Voltage Insulator Protective shield of metal to protect insulator |
GATI, Bila |
Protective Shield | |
| 1934 | ||||||
| U | 1,947,321 | February 13, 1934 | Arcing Horn for Insulators Arcing horns for Hewlett or other suspension insulator string |
VINCENT, Harold Blanchard SLEEMAN, Harold Parker |
Suspension | The R. Thomas & Sons Co. |
| 1935 | ||||||
| U | 2,022,863 | December 3, 1935 | Arcing Guard Metal arcing guard for suspension string |
LUSIGNAN, JR., Joseph T. |
Arcing Ring | The Ohio Brass Co. |
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