Tetsuya Hirashima

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Ibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Surface acoustic wave filter device formed on a plurality of piezoe...
- Patent number 5,202,652
- Issue date Apr 13, 1993
- Hitachi, Ltd.
- Toyoji Tabuchi
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Surface acoustic wave band-pass filter with different phase weighte...
- Patent number 5,087,901
- Issue date Feb 11, 1992
- Hitachi, Ltd.
- Kazuhito Kurosawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Surface acoustic wave filter
- Patent number 4,939,487
- Issue date Jul 3, 1990
- Hitachi, Ltd.
- Akitsuna Yuhara
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Saw device
- Patent number 4,775,814
- Issue date Oct 4, 1988
- Hitachi, Ltd.
- Akitsuna Yuhara
- H03 - BASIC ELECTRONIC CIRCUITRY