Hiroyuki Umeda

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Suwa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Adjustable current consumption power supply apparatus
- Patent number 7,009,858
- Issue date Mar 7, 2006
- Seiko Epson Corporation
- Hiroyuki Umeda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Power supply apparatus
- Patent number 6,903,538
- Issue date Jun 7, 2005
- Seiko Epson Corporation
- Hiroyuki Umeda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Charge pump circuit DC/DC converter and power supply apparatus for...
- Patent number 6,738,271
- Issue date May 18, 2004
- Seiko Epson Corporation
- Hiroyuki Umeda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Adjustable current consumption power supply apparatus
- Patent number 6,597,158
- Issue date Jul 22, 2003
- Seiko Epson Corporation
- Hiroyuki Umeda
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
POLARIZATION CONVERSION ELEMENT AND PROJECTOR
- Publication number 20170329213
- Publication date Nov 16, 2017
- SEIKO EPSON CORPORATION
- Tomohiro TAKAGI
- G02 - OPTICS
Information Patent Application
Power supply apparatus
- Publication number 20040165407
- Publication date Aug 26, 2004
- Hiroyuki Umeda
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
Power supply apparatus
- Publication number 20020167827
- Publication date Nov 14, 2002
- Hiroyuki Umeda
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
DC/DC converter and power supply apparatus for liquid crystal device
- Publication number 20020110009
- Publication date Aug 15, 2002
- Hiroyuki Umeda
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Application
Power supply apparatus
- Publication number 20020109488
- Publication date Aug 15, 2002
- Hiroyuki Umeda
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...