TECHNOLOGY RESEARCH CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01H ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES 193
 
  
 
H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS 176

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9124087 Arc suppression circuitMay 06, 13Sep 01, 15[H01H, H02H]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2013/0247,778 ENHANCED SAFETY FOR ELECTRICAL APPLIANCES SUCH AS TOASTERSAbandonedMar 24, 13Sep 26, 13[A47J, H02H]
2008/0108,252 Leakage current detection and interruption circuitAbandonedJan 07, 08May 08, 08[H01R, H02H]
2006/0120,007 Apparatus for controlling interconnect switchAbandonedOct 25, 05Jun 08, 06[H01H]
6184496 Driveway, walkway and roof snow and ice melting matExpiredMay 31, 00Feb 06, 01[H05B]
6180929 Heating pad apparatus adapted for outdoor useExpiredAug 06, 98Jan 30, 01[H05B]
5966502 Apparatus for melting snow and iceExpiredAug 13, 97Oct 12, 99[A47J, F28F]
5229730 Resettable circuit interrupterExpiredAug 16, 91Jul 20, 93[H01H]
4931894 Ground fault current interrupter circuit with arcing protectionExpiredSep 29, 89Jun 05, 90[H02H]
4731576 Alternating current watt transducerExpiredNov 13, 85Mar 15, 88[G01R]
4598331 Ground fault current interrupter circuit with open neutral and ground lead protectionExpiredJul 30, 84Jul 01, 86[H02H]
4567456 Resettable circuit closing deviceExpiredJun 13, 83Jan 28, 86[H01H]

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