Inventor
Shin Nakajima
Inventor
Kumagaya, JP
Overview
Patents· 27 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Fprimary
H01FMagnets23%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems10%
H03KPulse technique8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein6%
C21DModifying the physical structure of ferrous metals4%
G01RMeasuring electric variables4%
G05FSystems for regulating electric or magnetic variables4%
G06FElectric digital data processing4%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light4%
PatentTitleYear
7,787,777'Optical packet network system'20107,656,149'Current transformer and electric energy meter'20107,317,848'Optical switch'20087,116,856'Optical switch matrix'20066,930,623'Optical signal processing system'20056,891,986'Optical switch'20056,693,713'Mark detection method, exposure method, device manufacturing method, mark detection apparatus, exposure apparatus, and device'20046,504,737'Magnetic core for saturable reactor, magnetic amplifier type multi-output switching regulator and computer having magnetic amplifier type multi-output switching regulator'20036,270,592'Magnetic core for saturable reactor, magnetic amplifier type multi-output switching regulator and computer having magnetic amplifier type multi-output switching regulator'20015,952,856'Inductive load driving method and H-bridge circuit control device'19995,850,336'Apparatus having an inverter'19985,725,686'Magnetic core for pulse transformer and pulse transformer made thereof'19985,635,828'Active filter circuit and power supply apparatus including same'19975,623,171'High-voltage pulse generating circuit and electrostatic recipitator containing it'19975,611,871'Method of producing nanocrystalline alloy having high permeability'19975,541,726'Relative azimuth measuring method and apparatus'19965,486,404'Nano-crystalline soft magnetic alloy ribbon with insulation coating and magnetic core made therefrom and pulse generator, laser unit and accelerator therewith'19965,443,664'Surge current-suppressing circuit and magnetic device therein'19955,289,494'Distributed feedback semiconductor laser'19945,184,085'High-voltage pulse generating circuit, and discharge-excited laser and accelerator containing such circuit'19935,072,191'High-voltage pulse generating circuit, and discharge-excited laser and accelerator containing such circuit'19914,983,859'Magnetic device for high-voltage pulse generating apparatuses'19914,871,925'High-voltage pulse generating apparatus'19894,827,214'Method for measuring losses of a magnetic core'19894,811,187'DC-DC converter with saturable reactor reset circuit'19894,769,091'Magnetic core'19884,626,976'Switch mode power supply having magnetically controlled output'1986Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1986–2003Patents assigned to HITACHI METALS LTD (17)· patent assignee history
1986Patents assigned to HITACHI LTD (1)· patent assignee history
1986–1998Based in Kumagaya, JP· patent location history
1989–2003Based in Saitama, JP· patent location history
1994–2010Based in Tokyo, JP· patent location history
1998Patents assigned to HITACHI FERRITE ELECT LTD (1)· patent assignee history
2004Based in Kawasaki, JP· patent location history
2005–2010Patents assigned to YOKOGAWA ELECTRIC CORP (5)· patent assignee history
2005–2010Based in Musashino, JP· patent location history
2010Patents assigned to METGLAS INC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI METALS LTD | 17 | 1986–2003 |
| YOKOGAWA ELECTRIC CORP | 5 | 2005–2010 |
| HITACHI FERRITE ELECT LTD | 1 | 1998 |
| HITACHI LTD | 1 | 1986 |
| METGLAS INC | 1 | 2010 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kumagaya, JP | 13 | 1986–1998 |
| Musashino, JP | 5 | 2005–2010 |
| Tokyo, JP | 3 | 1994–2010 |
| Saitama, JP | 3 | 1989–2003 |
| Kawasaki, JP | 1 | 2004 |