Kou-I Yeh

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Taipei, TW

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for timely controlling the sound characteristic of a sign...
- Patent number 4,856,056
- Issue date Aug 8, 1989
- Inventa electronics Co., Ltd.
- Kou-I Yeh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Hot-line device for telephone sets
- Patent number 4,802,208
- Issue date Jan 31, 1989
- Inventa electronics Co., Ltd.
- Kou-I Yeh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Switching control apparatus for intercom-telephone sets
- Patent number 4,794,640
- Issue date Dec 27, 1988
- Inventa electronics Co., Ltd.
- Kou-I Yeh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for timely controlling the sound characteristic of a sign...
- Patent number 4,644,106
- Issue date Feb 17, 1987
- Inventa electronics Co., Ltd.
- Kou-I Yeh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE