For the Inventor, By the Inventor

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Santa Clara, CA, United States of America

Time and Frequency Technology Inc.

USPTO Granted Patents = 2

Forward Citations = 59

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5 inventors (with patents filed for the assignee):

John James (1 out of 4 patents)

Joseph C Wu (1 out of 4 patents)

Calvin W Eckels, Jr (1 out of 1 patent)

4. Clyde R Walsworth (1 out of 1 patent)

5. Calvin Eckels (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 4392248 - Attention signal receiver for emergency broadcast systems (1983-07-05),

2. 4027332 - Apparatus for monitoring television receivers (1977-05-31),

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USPTO Data Jan 1 1976 - Jan 6 2026

2 Patents

#780 in Santa Clara, CA

#20,566 in California

#92,696 in US

Santa Clara, CA, United States of America

Time and Frequency Technology Inc.

Forward Citations = 59

5 inventors:

John James (1 out of 4 patents)

Joseph C Wu (1 out of 4 patents)

Calvin W Eckels, Jr (1 out of 1 patent)

4. Clyde R Walsworth (1 out of 1 patent)

5. Calvin Eckels (1 out of 1 patent)

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