Keitaro Sekine

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Tuning circuit having amplitude-varying function
- Patent number 7,171,178
- Issue date Jan 30, 2007
- Sanyo Electric Co., LTD
- Masahiro Umewaka
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Variable gain amplifier with a gain exhibiting a linear in dB chara...
- Patent number 6,791,413
- Issue date Sep 14, 2004
- Renesas Technology Corp.
- Hiroshi Komurasaki
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
Radio-frequency circuit
- Publication number 20100201447
- Publication date Aug 12, 2010
- SEMICONDUCTOR TECHNOLOGY ACADAMIC RESEARCH CENTER
- Akira Hyogo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Radio-frequency circuit
- Publication number 20060194559
- Publication date Aug 31, 2006
- Semiconductor Technology Academic Research Center
- Akira Hyogo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Tuning circuit having amplitude-varying function
- Publication number 20040198285
- Publication date Oct 7, 2004
- Masahiro Umewaka
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Variable gain amplifier with a gain exhibiting a linear in dB chara...
- Publication number 20040046608
- Publication date Mar 11, 2004
- Mitsubishi Denki Kabushiki Kaisha
- Hiroshi Komurasaki
- H03 - BASIC ELECTRONIC CIRCUITRY