Jun Hirai

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Kyoto, JP

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Patents Grantslast 30 patents

Information Patent Grant
Data converters for sound equipment
- Patent number 5,815,530
- Issue date Sep 29, 1998
- Rohm Co., Ltd.
- Jun Hirai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Audio apparatus having a karaoke function
- Patent number 5,541,999
- Issue date Jul 30, 1996
- Rohm Co., Ltd.
- Jun Hirai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Echo attaching circuit and audio device using the same
- Patent number 5,444,785
- Issue date Aug 22, 1995
- Rohm Co., Ltd.
- Kaoru Izawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Echo attaching circuit and audio device using the same
- Patent number 5,394,474
- Issue date Feb 28, 1995
- Rohm Co., Ltd.
- Jun Hirai
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Transmission gate
- Patent number 5,332,916
- Issue date Jul 26, 1994
- Rohm Co., Ltd.
- Jun Hirai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Audio signal amplifier circuit
- Patent number 5,300,892
- Issue date Apr 5, 1994
- Rohm Co., Ltd.
- Jun Hirai
- H03 - BASIC ELECTRONIC CIRCUITRY