Ching-Long Song

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Columbus, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Digital-to-analog converter for a communication system
- Patent number 4,087,754
- Issue date May 2, 1978
- North Electric Company
- Ching-Long Song
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Signal coding for telephone communication system
- Patent number 3,949,299
- Issue date Apr 6, 1976
- North Electric Company
- Ching-Long Song
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal coding for telephone communication system
- Patent number 3,937,897
- Issue date Feb 10, 1976
- North Electric Company
- Ching-Long Song
- H04 - ELECTRIC COMMUNICATION TECHNIQUE