Yohei Ichikawa

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Push-button switch and electronic apparatus having the same
- Patent number 8,071,902
- Issue date Dec 6, 2011
- Panasonic Corporation
- Yohei Ichikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Key sheet, press switch and electronic device provided with the pre...
- Patent number 7,978,467
- Issue date Jul 12, 2011
- Panasonic Corporation
- Yohei Ichikawa
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
High frequency amplifier with a guard circuit and a radio wave tran...
- Patent number 5,990,736
- Issue date Nov 23, 1999
- Matsushita Electric Industrial Co., Ltd.
- Isao Nasuno
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Power amplifier with an idle current trimmed and a method of trimmi...
- Patent number 5,986,503
- Issue date Nov 16, 1999
- Matsushita Electric Industrial Co., Ltd.
- Yohei Ichikawa
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
KEY SHEET, PRESS SWITCH AND ELECTRONIC DEVICE PROVIDED WITH THE PRE...
- Publication number 20100101927
- Publication date Apr 29, 2010
- PANASONIC CORPORATION
- Yohei Ichikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
PUSH-BUTTON SWITCH AND ELECTRONIC APPARATUS HAVING THE SAME
- Publication number 20090090607
- Publication date Apr 9, 2009
- Matsushita Electric Industrial Co., Ltd.
- Yohei Ichikawa
- H01 - BASIC ELECTRIC ELEMENTS