Inventor
Masakazu Ushijima
Inventor
Tokyo, JP
Overview
Patents· 21 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H05Bprimary
H05BElectric heating35%
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%
G01RMeasuring electric variables8%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
H01FMagnets6%
H01JElectric discharge tubes or discharge lamps6%
H02JElectric power networks6%
F21KNon-electric light sources using luminescence4%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein4%
PatentTitleYear
11,005,300Wireless power transfer system202110,547,214Wireless power transfer system202010,243,406Wireless power transfer system20198,102,681'Measurement apparatus, test apparatus, and measurement method'20127,834,726'Module for parallel lighting and balancer coil for discharge lamp'20107,772,785'Parallel lighting system for surface light source discharge lamps'20107,605,544'Current balancing circuit'20097,589,478'Inverter circuit for discharge lamps for multi-lamp lighting and surface light source system'20097,548,028'Current-mode resonant inverter circuit'20097,541,749'Current-mode resonant inverter circuit for discharge lamp'20097,479,740'Module for parallel lighting and balancer coil for discharge lamp'20097,474,064'Lamp driving circuit for a discharge lamp and a control method thereof'20097,453,216'Current resonance type inverter circuit and power controlling method'20087,391,166'Parallel lighting system for surface light source discharge lamps'20087,365,501'Inverter transformer'20087,282,868'Inverter circuit for discharge lamps for multi-lamp lighting and surface light source system'20077,141,935'Inverter circuit for surface light source system'20066,774,580'Inverter circuit for a discharge tube'20046,201,356'Converter for correcting resonance frequency between backlit panel assembly of liquid crystal display and transformer of AC inverter'20015,959,412'Inverter circuit for discharge tube having impedance matching circuit'19995,495,405'Inverter circuit for use with discharge tube'1996Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1996–2012Patents assigned to USHIJIMA MASAKAZU (9)· patent assignee history
1996–2021Based in Tokyo, JP· patent location history
2006–2009Based in Nakano-ku, JP· patent location history
2007–2009Patents assigned to KAWAMOTO KOJI (2)· patent assignee history
2008–2009Patents assigned to GREATCHIP TECHNOLOGY CO LTD (3)· patent assignee history
2009–2010Patents assigned to HONG FEI CHEN (2)· patent assignee history
2019–2021Patents assigned to WQC INC (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| USHIJIMA MASAKAZUself | 9 | 1996–2012 |
| GREATCHIP TECHNOLOGY CO LTD | 3 | 2008–2009 |
| WQC INC | 3 | 2019–2021 |
| HONG FEI CHEN | 2 | 2009–2010 |
| KAWAMOTO KOJI | 2 | 2007–2009 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 18 | 1996–2021 |
| Nakano-ku, JP | 3 | 2006–2009 |