The Tokyo Electric Power Co., Ltd.

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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
 
  
 
H01M PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 1153

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6005213 Insulated type switchgear deviceFeb 24, 98Dec 21, 99[H01H]
5952636 Vacuum type switch gear device having L shaped stationary and movable conductors arrangementJun 25, 98Sep 14, 99[H01M]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5683059 Bobbin for superconducting coilsExpiredApr 12, 96Nov 04, 97[H01B, B65H]
5217932 Sintered ceramic composite body and method of manufacturing sameExpiredSep 14, 90Jun 08, 93[C04B]
5209645 Ceramics-coated heat resisting alloy memberExpiredJun 15, 90May 11, 93[B63H]
5157557 Multitrack system for PCM recording and playback of audio signals and supersonic wavesExpiredJun 21, 90Oct 20, 92[G11B]
5046235 Method of and apparatus for assembling a transformer coreExpiredFeb 13, 91Sep 10, 91[H01F]
4955082 Mobile communication systemExpiredJan 11, 89Sep 04, 90[H04Q, H04J]
4947452 Mobile communication systemExpiredJan 11, 89Aug 07, 90[H04A, H04B]
4881026 Method and apparatus for diagnosing abnormal state of sodium (NA)--sulfur (S) cellExpiredJun 25, 87Nov 14, 89[G01N]

Top Inventors for This Owner

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