For the Inventor, By the Inventor

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Austin, TX, United States of America

Videotelecom Corp.

USPTO Granted Patents = 2

Forward Citations = 260

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5 inventors (with patents filed for the assignee):

Joonyoul Maeng (1 out of 4 patents)

Joe W Duran (1 out of 5 patents)

Errol R Williams (1 out of 1 patent)

4. Michael L Kenoyer (1 out of 1 patent)

5. Edward H Cooper, Jr (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 4965822 - Full duplex speakerphone (1990-10-23),

2. 4893326 - Video-telephone communications system (1990-01-09),

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USPTO Data Jan 1 1976 - Dec 30 2025

2 Patents

#862 in Austin, TX

#6,138 in Texas

#92,662 in US

Austin, TX, United States of America

Videotelecom Corp.

Forward Citations = 260

5 inventors:

Joonyoul Maeng (1 out of 4 patents)

Joe W Duran (1 out of 5 patents)

Errol R Williams (1 out of 1 patent)

4. Michael L Kenoyer (1 out of 1 patent)

5. Edward H Cooper, Jr (1 out of 1 patent)

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