|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';
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||63,206||March 26, 1867||Improvement in Insulators for Telegraph Wires
Hook encased in metal or wood allows arcing to ground
|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.|
|U||1,273,015||July 16, 1918||Electric Insulator
Suspension made of several parts bolted together
|THOMAS, Percy H.
|U||1,277,304||August 27, 1918||Metal Protected High Voltage Insulator
Protective shield of metal to protect insulator
|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.|
|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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