Tatsuo Iwata

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Patents Grantslast 30 patents

Information Patent Grant
Multilayer piezoelectric filter with an air vent between two resona...
- Patent number 6,590,474
- Issue date Jul 8, 2003
- NGK Spark Plug Co., Ltd.
- Tatsuo Iwata
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
6-elements ladder type piezoelectric filter
- Patent number 5,939,957
- Issue date Aug 17, 1999
- NGK Spark Plug Co., Ltd
- Tatsuo Iwata
- 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

Patents Applicationslast 30 patents

Information Patent Application
Multilayer type piezoelectric filter
- Publication number 20020024408
- Publication date Feb 28, 2002
- NGK SPARK PLUG CO., LTD.
- Tatsuo Iwata
- H03 - BASIC ELECTRONIC CIRCUITRY