System Homes Company, Ltd.

Patent Owner

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS 285
 
  
 
H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF 1101

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7456600 Pulse code width modulation motor drive systemJun 24, 08Nov 25, 08[H02P]
5420778 Independent real time control of output frequency and voltage of PWM inverterApr 05, 94May 30, 95[H02M, H02P]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4634952 InverterExpiredNov 30, 83Jan 06, 87[H02P]
4593881 Electronic expansion valveExpiredSep 19, 85Jun 10, 86[F16K, F25B]
4507936 Integral solar and heat pump water heating systemExpiredAug 19, 83Apr 02, 85[F25B]
4481788 Water heating systemExpiredDec 08, 82Nov 13, 84[F25D]
4420947 Heat pump air conditioning systemExpiredJul 02, 82Dec 20, 83[F24J, F25B]

Top Inventors for This Owner

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