Growing community of inventors

Saratoga, CA, United States of America

Darrell Fongson

Average Co-Inventor Count = 4.71

ph-index = 2

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 25

Darrell FongsonVinod Nagarajan (4 patents)Darrell FongsonRajah Kalipatnapu (4 patents)Darrell FongsonSrivatsan Kasturi (4 patents)Darrell FongsonG Alagiri (3 patents)Darrell FongsonDarrell Fongson (4 patents)Vinod NagarajanVinod Nagarajan (8 patents)Rajah KalipatnapuRajah Kalipatnapu (5 patents)Srivatsan KasturiSrivatsan Kasturi (4 patents)G AlagiriG Alagiri (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Comdial Corporation (2 from 12 patents)

2. Mist Silicon Limited Liability Company (1 from 3 patents)

3. Vertical Communications Acquisition Corp. (1 from 3 patents)


4 patents:

1. 9106767 - Systems and methods for information exchange and synchronization using DTMF over telephone communication channels

2. 8098801 - Systems and methods for information exchange and synchronization using DTMF over telephone communication channels

3. 7088804 - Systems and methods for information exchange and synchronization using DTMF over telephone communication channels

4. 6771751 - Systems and methods for information exchange and synchronization using DTMF over telephone communication channels

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as of
1/20/2026
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