ASAHI KASEI TOKO POWER DEVICES CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G05F SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES 892
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 5357
 
  
 
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 597
 
  
 
H03F AMPLIFIERS 578
 
  
 
H03K PULSE TECHNIQUE 5126
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 1446
 
  
 
H03B GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS 162
 
  
 
H03D DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER 148
 
  
 
H05B ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR 1110

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7710133 Testing method for semiconductor device having ball-shaped external electrodeMay 21, 08May 04, 10[G01R]
7057448 Variable output-type constant current source circuitJun 01, 04Jun 06, 06[G05F]
6525596 Series regulator having a power supply circuit allowing low voltage operationApr 23, 01Feb 25, 03[G05F]
6303979 Face-down bonding pin diodeSep 30, 99Oct 16, 01[H01L]
6153921 Diode deviceNov 05, 99Nov 28, 00[H01L]
6081075 DC to AC switching circuit for driving an electroluminescent lamp exhibiting capactive loading characteristicsMay 13, 99Jun 27, 00[H05B]
6031364 Series control type regulatorJul 29, 99Feb 29, 00[G05F]
6028456 Dual-threshold comparator circuit utilizing a single input pinAug 18, 98Feb 22, 00[H03K]
6011382 Circuit and method for directly regulating the output voltage of an electroluminescent lamp driverOct 01, 98Jan 04, 00[G05F]
6008527 Diode deviceMar 13, 98Dec 28, 99[H01L]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2010/0039,080 Single-inductor buck-boost converter with positive and negative outputsAbandonedAug 12, 08Feb 18, 10[G05F]
2009/0029,518 Method of fabricating schottky barrier diodeAbandonedJul 22, 08Jan 29, 09[H01L]
7157809 Method and circuits for inductive DC converters with current regulated outputExpiredSep 12, 02Jan 02, 07[H02J]
7113020 Capacitance multiplier circuit exhibiting improving bandwidthExpiredOct 25, 04Sep 26, 06[H03H]
6993467 Method and circuits for performing offline circuit trimmingExpiredDec 05, 00Jan 31, 06[G06F]
6927559 Constant voltage power supplyExpiredNov 24, 03Aug 09, 05[G05F]
6774576 Switch mode energy recovery for electro-luminescent lamp panelsExpiredSep 30, 02Aug 10, 04[G09G]
6624595 Resonant energy recovery for electro-luminescent lamp panelsExpiredJul 31, 01Sep 23, 03[H05B]
6600362 Method and circuits for parallel sensing of current in a field effect transistor (FET)ExpiredFeb 08, 02Jul 29, 03[G05F]
6459210 Switch mode energy recovery for electro-luminescent lamp panelsExpiredMar 01, 01Oct 01, 02[G09G]
5138279 Leapfrog filterExpiredJul 09, 90Aug 11, 92[H03F]
5028884 Leapfrog filter having adjustable center frequency and quality factorExpiredMay 23, 90Jul 02, 91[H03F]
5017950 Variable-capacitance diode element having wide capacitance variation rangeExpiredJan 17, 90May 21, 91[H01L]
4987459 Variable capacitance diode element having wide capacitance variation rangeExpiredJan 17, 90Jan 22, 91[H01L]

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