Direct Drive Systems, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H02K DYNAMO-ELECTRIC MACHINES 1295
 
  
 
H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS 384
 
  
 
E21B EARTH OR ROCK DRILLING 195
 
  
 
F01C ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES 128
 
  
 
F01D NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES 164
 
  
 
F02C GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS 158
 
  
 
F02D CONTROLLING COMBUSTION ENGINES 172
 
  
 
G05B CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS 1100
 
  
 
H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 1119

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8421297 Stator wedge for an electric machineJul 01, 09Apr 16, 13[H02K]
8415854 Stator for an electric machineJul 01, 09Apr 09, 13[H02K]
8350432 Electric machineJul 01, 09Jan 08, 13[H02K]
8310123 Wrapped rotor sleeve for an electric machineJul 01, 09Nov 13, 12[H02K]
8253298 Slot configuration of an electric machineJul 01, 09Aug 28, 12[H02K]
8247938 Rotor for electric machine having a sleeve with segmented layersJul 01, 09Aug 21, 12[H02K]
8237320 Thermally matched composite sleeveJul 01, 09Aug 07, 12[H02K]
8183734 Hybrid winding configuration of an electric machineJul 01, 09May 22, 12[H02K]
8179009 Rotor for an electric machineJul 01, 09May 15, 12[H02K]
8154158 Cooling an electrical machineMar 14, 08Apr 10, 12[H02K]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
8334630 Stator for an electric machineWithdrawnJul 01, 09Dec 18, 12[H02K]
2010/0019,598 ROTOR FOR AN ELECTRIC MACHINEAbandonedJul 01, 09Jan 28, 10[H02K]
2010/0019,599 ROTOR FOR AN ELECTRIC MACHINEAbandonedJul 01, 09Jan 28, 10[H02K]
2010/0019,609 END TURN CONFIGURATION OF AN ELECTRIC MACHINEAbandonedJul 01, 09Jan 28, 10[H02K]

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