C.E. NIEHOFF & CO.

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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 1770
 
  
 
1301 GENERATORS AND MOTORS146
 
  
 
F02D CONTROLLING COMBUSTION ENGINES 766
 
  
 
B60L ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL 571
 
  
 
H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS 572
 
  
 
H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 5115
 
  
 
H01H ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES 292
 
  
 
1302 POWER TRANSFORMERS, RECTIFIERS, BATTERIES AND ACCUMULATORS233
 
  
 
B60R VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR 1109
 
  
 
F02C GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS 158

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
D773995 Electric generatorMar 31, 15Dec 13, 16[1301]
8823208 Self-energizing voltage regulator with improved transient recoveryNov 16, 11Sep 02, 14[H02P, H02G, B60L]
D705165 Electric generatorNov 11, 13May 20, 14[1301]
8432069 System and method for generator phase signal monitoring and controlJun 08, 12Apr 30, 13[H01H]
D680493 Electric generatorOct 11, 12Apr 23, 13[1301]
D680073 Electric generatorMay 17, 12Apr 16, 13[1301]
D680074 Electric generatorOct 11, 12Apr 16, 13[1301]
8289005 Field transient suppression system and methodSep 30, 08Oct 16, 12[H02P, H02H]
8283797 Power control system and methodApr 16, 09Oct 09, 12[H02P, F02D]
D665353 Battery isolator deviceDec 09, 11Aug 14, 12[1302]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2014/0266,013 SWITCHED VOLTAGE BOOSTERAbandonedJul 30, 13Sep 18, 14[H02J]
2014/0244,107 BATTERY CHARGE VOLTAGE COMPENSATING SYSTEM AND METHOD OF OPERATIONAbandonedFeb 28, 13Aug 28, 14[B60L]
2013/0234,678 ALTERNATOR RIPPLE VOLTAGE REDUCTION USING OUTPUT FEEDBACK TO AN INDEPENDENT FIELD COILAbandonedMar 06, 12Sep 12, 13[H02P]
8283810 System and method for generator phase signal monitoring and control of electrical current distributionExpiredNov 25, 09Oct 09, 12[H01H]
8072092 System and method for sequentional electrical power delivery from two generators in a vehicle electrical systemExpiredFeb 16, 10Dec 06, 11[B60L]
2010/0213,775 High power density generatorAbandonedFeb 24, 09Aug 26, 10[H02K]
2008/0218,035 Rotating rectifier assemblyAbandonedMar 09, 07Sep 11, 08[H02K]
7276804 Voltage regulator with improved protection and warning systemExpiredJun 22, 05Oct 02, 07[F02B]
2007/0069,521 Power control system and methodAbandonedSep 23, 05Mar 29, 07[H02P, F02D]
4963813 Control providing progressive charging in a dual voltage charging systemExpiredDec 02, 88Oct 16, 90[H02J]

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