Takamisawa Electric 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 688
 
  
 
H01F MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 381
 
  
 
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
6731190 Electromagnetic relayFeb 06, 02May 04, 04[H01F]
6670871 Polar relayAug 22, 01Dec 30, 03[H01H]
6606018 Electromagnetic relayMar 26, 02Aug 12, 03[H01H]
6265958 Electromagnetic relay, joining structure for hinge spring and yoke in the electromagnetic relay, and flux penetration preventing structureAug 03, 00Jul 24, 01[H01F]
6211761 Electromagnetic relay, joining structure for hinge spring and yoke in the electromagnetic relay, and flux penetration preventing structureMar 16, 98Apr 03, 01[H01F]
6181790 Electromagnetic relay used in a telephone exchange or the like and contact spring assembly for the electromagnetic relayMar 12, 98Jan 30, 01[H01M]
5264812 Small, economical and stable polarized electromagnetic relay having two groups of electromagnetic relay portionsJan 04, 93Nov 23, 93[H01H]
5239281 Small sized electromagnetic relayAug 07, 92Aug 24, 93[H01H]
5202663 Small sized electromagnetic relayDec 02, 91Apr 13, 93[H01H]
5162764 Slim-type polarized electromagnetic relayJun 19, 91Nov 10, 92[H01H]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6972651 Switch operable under a predetermined condition, external magnetic field generating unit, combination of such a switch and an external magnetic field generating unit and electronic apparatus incorporating the sameExpiredMar 05, 02Dec 06, 05[H01H]
4910484 Electromagnetic relay having silencing effectExpiredApr 24, 89Mar 20, 90[H01H]
4843360 Polarized electromagnetic relayExpiredFeb 02, 88Jun 27, 89[H01H]
4767944 Hybrid relay circuit having electromagnetic relay for switching AC power supplyExpiredJul 20, 87Aug 30, 88[H01H]
4703295 Electromagnetic relay having precise positional relationship between elementsExpiredSep 09, 85Oct 27, 87[H01H]
4539543 Core structure for an electromagnetic relayExpiredJul 30, 84Sep 03, 85[H01F]
4516099 Electromagnetic relayExpiredApr 15, 82May 07, 85[H01H]
4472699 Electromagnetic relayExpiredJul 08, 82Sep 18, 84[H01F]
4439750 Armature holding structure and hinge wire spring used thereinExpiredApr 20, 82Mar 27, 84[H01F]

Top Inventors for This Owner

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