Hiroyuki Kumasaka

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Kyoto, JP

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Patents Grantslast 30 patents

Information Patent Grant
Digital control power circuit, control circuit thereof, control met...
- Patent number 9,935,543
- Issue date Apr 3, 2018
- ROHM CO., LTD.
- Hiroyuki Kumasaka
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Power control device, system, and method using switches for fast st...
- Patent number 9,684,289
- Issue date Jun 20, 2017
- Rohm Co., Ltd.
- Hiroyuki Kumasaka
- G05 - CONTROLLING REGULATING
Information Patent Grant
Driving circuit for light emitting diode
- Patent number 8,552,971
- Issue date Oct 8, 2013
- Rohm Co., Ltd.
- Hiroyuki Ishikawa
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
DIGITAL CONTROL POWER CIRCUIT, CONTROL CIRCUIT THEREOF, CONTROL MET...
- Publication number 20160359410
- Publication date Dec 8, 2016
- Rohm Co., Ltd.
- Hiroyuki KUMASAKA
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
POWER CONTROL DEVICE, POWER CONTROL SYSTEM, AND POWER CONTROL METHOD
- Publication number 20140088786
- Publication date Mar 27, 2014
- Rohm Co., Ltd.
- Hiroyuki KUMASAKA
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
DRIVING CIRCUIT FOR LIGHT EMITTING DIODE
- Publication number 20110018914
- Publication date Jan 27, 2011
- Rohm Co., Ltd.
- Hiroyuki Ishikawa
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS