Jack G. S. Lum

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Sunnyvale, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
High-efficiency Ring/MWL generator
- Patent number 5,440,262
- Issue date Aug 8, 1995
- ROLM Company
- Jack G. S. Lum
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multipurpose analog telephony channel test facility method and appa...
- Patent number 5,425,075
- Issue date Jun 13, 1995
- Roln Company
- Brian T. Selden
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Filter circuit
- Patent number 4,032,857
- Issue date Jun 28, 1977
- Sound Technology, Inc.
- Jack G. S. Lum
- G01 - MEASURING TESTING
Information Patent Grant
Distortion measurement system
- Patent number 3,978,401
- Issue date Aug 31, 1976
- Sound Technology, Inc.
- Jack G. S. Lum
- G01 - MEASURING TESTING
Information Patent Grant
Distortion measurement system
- Patent number 3,940,715
- Issue date Feb 24, 1976
- Sound Technology, Inc.
- Jack G. S. Lum
- G01 - MEASURING TESTING