Youhei Ishikawa

Person

Kyoto, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Device with a nonradiative dielectric waveguide with coupling gap
- Patent number 6,362,696
- Issue date Mar 26, 2002
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- G01 - MEASURING TESTING
Information Patent Grant
Communication module for a means of transportation
- Patent number 6,239,757
- Issue date May 29, 2001
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- G01 - MEASURING TESTING
Information Patent Grant
Electromagnetically coupling nonradiative dielectric waveguides
- Patent number 6,218,916
- Issue date Apr 17, 2001
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- G01 - MEASURING TESTING
Information Patent Grant
Thin film multilayered electrode of high frequency electromagnetic...
- Patent number 6,148,221
- Issue date Nov 14, 2000
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Antenna with nonradiative dielectric waveguide
- Patent number 6,008,771
- Issue date Dec 28, 1999
- Murata Manufacturing Co., Ltd.
- Nobuaki Tanaka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Device with a nonradiative dielectric waveguide
- Patent number 5,825,268
- Issue date Oct 20, 1998
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Leakage dielectric waveguide and plane antenna using said leakage d...
- Patent number 5,757,331
- Issue date May 26, 1998
- Murata Manufacturing Co., Ltd.
- Tsukasa Yoneyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
High-frequency integrated circuit
- Patent number 5,724,013
- Issue date Mar 3, 1998
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- G01 - MEASURING TESTING
Information Patent Grant
High-frequency integrated circuit
- Patent number 5,604,469
- Issue date Feb 18, 1997
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- G01 - MEASURING TESTING
Information Patent Grant
Measuring jig used for evaluation of a device with a nonradiative d...
- Patent number 5,600,289
- Issue date Feb 4, 1997
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- G01 - MEASURING TESTING
Information Patent Grant
Signal-to-noise enhancer
- Patent number 5,523,725
- Issue date Jun 4, 1996
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Nonradiative dielectric waveguide and manufacturing method thereof
- Patent number 5,473,296
- Issue date Dec 5, 1995
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Antenna supervising apparatus comprising a standing wave ratio meas...
- Patent number 5,408,690
- Issue date Apr 18, 1995
- Murata Mfg. Co., Ltd.
- Youhei Ishikawa
- G01 - MEASURING TESTING
Information Patent Grant
Active-type band-pass filter
- Patent number 5,379,009
- Issue date Jan 3, 1995
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
TE.sub.101 triple mode dielectric resonator apparatus
- Patent number 5,325,077
- Issue date Jun 28, 1994
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Filter arrangement including a non-reversible circuit element, a ba...
- Patent number 5,291,160
- Issue date Mar 1, 1994
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Auto-tuned apparatus for band-pass filter
- Patent number 5,235,294
- Issue date Aug 10, 1993
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Radio frequency signal combining/sorting apparatus
- Patent number 5,229,729
- Issue date Jul 20, 1993
- Murata Manufacturing Co., Ltd.
- Toshio Nishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Parallel connection multi-stage band-pass filter comprising resonat...
- Patent number 5,184,096
- Issue date Feb 2, 1993
- Murata Manufacturing Co., Ltd.
- Kikuo Wakino
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Non-reciprocal circuit element
- Patent number 5,159,294
- Issue date Oct 27, 1992
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Filter apparatus
- Patent number 5,132,651
- Issue date Jul 21, 1992
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Method of measuring dielectric material constants and measuring dev...
- Patent number 5,119,034
- Issue date Jun 2, 1992
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- G01 - MEASURING TESTING
Information Patent Grant
Parallel connection multi-stage band-pass filter
- Patent number 5,097,236
- Issue date Mar 17, 1992
- Murata Manufacturing Co., Ltd.
- Kikuo Wakino
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Dielectric resonator having a cutout portion for receiving an unita...
- Patent number 5,049,842
- Issue date Sep 17, 1991
- Murata Mfg. Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Band elimination filter and dielectric resonator therefor
- Patent number 4,996,506
- Issue date Feb 26, 1991
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Rod type dielectric resonating device with coupling plates
- Patent number 4,942,377
- Issue date Jul 17, 1990
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Microstripline filter
- Patent number 4,916,417
- Issue date Apr 10, 1990
- Murata Mfg. Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Radio frequency signal combining/sorting device
- Patent number 4,902,991
- Issue date Feb 20, 1990
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Dielectric filter
- Patent number 4,839,773
- Issue date Jun 13, 1989
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Dielectric resonator apparatus
- Patent number 4,821,006
- Issue date Apr 11, 1989
- Murata Manufacturing Co., Ltd.
- Youhei Ishikawa
- H01 - BASIC ELECTRIC ELEMENTS

Youhei Ishikawa

Person

Patents Grantslast 30 patents

Device with a nonradiative dielectric waveguide with coupling gap

Communication module for a means of transportation

Electromagnetically coupling nonradiative dielectric waveguides

Thin film multilayered electrode of high frequency electromagnetic...

Antenna with nonradiative dielectric waveguide

Device with a nonradiative dielectric waveguide

Leakage dielectric waveguide and plane antenna using said leakage d...

High-frequency integrated circuit

High-frequency integrated circuit

Measuring jig used for evaluation of a device with a nonradiative d...

Signal-to-noise enhancer

Nonradiative dielectric waveguide and manufacturing method thereof

Antenna supervising apparatus comprising a standing wave ratio meas...

Active-type band-pass filter

TE.sub.101 triple mode dielectric resonator apparatus

Filter arrangement including a non-reversible circuit element, a ba...

Auto-tuned apparatus for band-pass filter

Radio frequency signal combining/sorting apparatus

Parallel connection multi-stage band-pass filter comprising resonat...

Non-reciprocal circuit element

Filter apparatus

Method of measuring dielectric material constants and measuring dev...

Parallel connection multi-stage band-pass filter

Dielectric resonator having a cutout portion for receiving an unita...

Band elimination filter and dielectric resonator therefor

Rod type dielectric resonating device with coupling plates

Microstripline filter

Radio frequency signal combining/sorting device

Dielectric filter

Dielectric resonator apparatus