Calvin W. Eckels Jr.

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San Jose, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Attention signal receiver for emergency broadcast systems
- Patent number 4,392,248
- Issue date Jul 5, 1983
- Time and Frequency Technology, Inc.
- Calvin Eckels
- G08 - SIGNALLING
Information Patent Grant
Apparatus for monitoring television receivers
- Patent number 4,027,332
- Issue date May 31, 1977
- Time and Frequency Technology Inc.
- Joseph C. Wu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE