U.S. Windpower, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F03D WIND MOTORS436
 
  
 
H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS 483
 
  
 
G05F SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES 199
 
  
 
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
5289041 Speed control system for a variable speed wind turbineAug 17, 92Feb 22, 94[H02P, F03D]
5225712 Variable speed wind turbine with reduced power fluctuation and a static VAR mode of operationNov 27, 91Jul 06, 93[H02P, F03D]
5187427 Static reactive power compensatorNov 27, 91Feb 16, 93[G05F]
5172310 Low impedance bus for power electronicsJul 10, 91Dec 15, 92[H02M]
5155375 Speed control system for a variable speed wind turbineSep 19, 91Oct 13, 92[H02P, F03D]
5083039 Variable speed wind turbineFeb 01, 91Jan 21, 92[H02P, F03D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5369353 Controlled electrical energy storage apparatus for utility gridsExpiredDec 08, 92Nov 29, 94[G05F]
5365424 High power laminated bus assembly for an electrical switching converterExpiredDec 15, 92Nov 15, 94[H02M, H01B]
4490093 Windpower systemExpiredJul 13, 81Dec 25, 84[F03D]
4474531 Windmill with direction-controlled featheringExpiredDec 27, 82Oct 02, 84[F03D]
4469956 Windmill support structureExpiredJan 24, 83Sep 04, 84[H02P, F03D]
4426192 Method and apparatus for controlling windmill blade pitchExpiredFeb 07, 83Jan 17, 84[F03D]

Top Inventors for This Owner

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