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Yasuhiko Nakagawa
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Nagoya, JP
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last 30 patents
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Patent Grant
High-frequency ladder type piezoelectric filter and piezoelectric r...
Patent number
5,574,414
Issue date
Nov 12, 1996
NGK Spark Plug Co., Ltd.
Tatsuo Ogawa
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Ladder type filter with adjustable resonator positioning member
Patent number
5,572,173
Issue date
Nov 5, 1996
NGK Spark Plug Co., Ltd.
Tatsuo Ogawa
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Piezoelectric filter in a casing sealed by an insulating filler and...
Patent number
5,392,012
Issue date
Feb 21, 1995
NGK Spark Plug Co., Ltd.
Tatsuo Iwata
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Ladder-type piezo-electric filter
Patent number
5,294,862
Issue date
Mar 15, 1994
NGK Spark Plug Co., Ltd.
Hisao Banno
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
High frequency ladder type piezo-electric filter with differently p...
Patent number
5,168,253
Issue date
Dec 1, 1992
NGK Spark Plug Co., Ltd.
Yasuhiko Nakagawa
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Ladder-type electric filter circuit apparatus
Patent number
4,864,259
Issue date
Sep 5, 1989
NGK Spark Plug Co., Ltd.
Kenji Takamoro
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Piezoelectric scanning device
Patent number
4,651,046
Issue date
Mar 17, 1987
NGK Spark Plug Co., Ltd.
Kanji Ohya
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER