Mitsubishi Mining & Cement Co., Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 1361
 
  
 
H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS 176
 
  
 
H04B TRANSMISSION 1209

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5495383 Circuit for protecting electronic equipment from overvoltage or overcurrent conditionsJun 14, 94Feb 27, 96[H02H]
5142511 Piezoelectric transducerJun 03, 91Aug 25, 92[H04B]
5122993 Piezoelectric transducerMay 29, 91Jun 16, 92[H01L]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5273579 Quick setting compositionsExpiredApr 28, 93Dec 28, 93[C04B]
5268662 Plunger type electromagnetExpiredJul 24, 92Dec 07, 93[H01F]
5202790 Photo-driven light beam deflecting apparatusExpiredMay 30, 90Apr 13, 93[G02F]
5141903 Pyroelectric ceramic compositionExpiredApr 02, 90Aug 25, 92[C04B]
5130277 Ceramic composite material and process of manufacturing thereofExpiredAug 15, 89Jul 14, 92[C04B]
5123739 Method of monitoring cement kiln and the apparatus thereforExpiredApr 16, 90Jun 23, 92[G01J]
5093291 Pyroelectric ceramic composite structureExpiredSep 11, 90Mar 03, 92[C04B]
5064791 Method of preparing ceramic composite powders and the powders obtained therebyExpiredJul 11, 90Nov 12, 91[C04B]
5050969 Photo-driven switching apparatusExpiredDec 26, 89Sep 24, 91[G02B]
5045638 Apparatus for shielding electromagnetic radiationExpiredMay 18, 89Sep 03, 91[H05K]
5036420 Surge absorberExpiredJul 28, 89Jul 30, 91[H02H]
5032471 Pyroelectric ceramic composition and multilayered structure therefromExpiredJul 12, 90Jul 16, 91[B32B]
5029043 LC circuit incorporated ceramic substrateExpiredMar 22, 90Jul 02, 91[H01F, H01G]
5013323 Implant material for replacing hard tissue of living bodyExpiredAug 13, 87May 07, 91[A61F]
5006953 Lead type chip capacitor and process for producing the sameExpiredJul 25, 89Apr 09, 91[H01G]
4979071 Protection circuit for a semiconductor circuitExpiredSep 13, 88Dec 18, 90[H02H]
4957437 Artificial toothExpiredFeb 16, 89Sep 18, 90[A61C]
4905121 Operation confirming device for electromagnetic actuatorExpiredMay 27, 87Feb 27, 90[H01F]
4897373 Dielectric ceramic compositionExpiredSep 27, 88Jan 30, 90[C04B]
4868711 Multilayered ceramic capacitorExpiredSep 28, 88Sep 19, 89[H01G]

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