Growing community of inventors

Naperville, IL, United States of America

David A Zahn

Average Co-Inventor Count = 3.27

ph-index = 3

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 = 31

David A ZahnGeorge Paul Wilkin (3 patents)David A ZahnGerald W Pfleging (3 patents)David A ZahnGregory A Freitag (1 patent)David A ZahnDavid A Zahn (3 patents)George Paul WilkinGeorge Paul Wilkin (29 patents)Gerald W PflegingGerald W Pfleging (21 patents)Gregory A FreitagGregory A Freitag (4 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Lucent Technologies Inc. (1 from 9,364 patents)

2. Alcatel Lucent (1 from 5,032 patents)

3. Alcatel-Lucent USA Inc. (1 from 1,310 patents)


3 patents:

1. 8160220 - Request to block use of remotely selected ring tone

2. 7792264 - Ring tone selected by calling party of third party played to called party

3. 7388490 - Methods and systems for locating VOIP terminals for improved 911 service

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as of
1/18/2026
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