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Fairfax Station, VA, United States of America

Daniel O'Callaghan

Average Co-Inventor Count = 1.78

ph-index = 4

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 = 837

Daniel O'CallaghanEugene L Lew (3 patents)Daniel O'CallaghanBruce W Kostreski (1 patent)Daniel O'CallaghanHenry G Hudson, Jr (1 patent)Daniel O'CallaghanDaniel O'Callaghan (4 patents)Eugene L LewEugene L Lew (3 patents)Bruce W KostreskiBruce W Kostreski (16 patents)Henry G Hudson, JrHenry G Hudson, Jr (5 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Bell Atlantic Network Services, Inc. (3 from 305 patents)

2. Bell Atlantic Corporation (1 from 12 patents)


4 patents:

1. 5820463 - Method and apparatus for multi-player gaming over a network

2. 5635979 - Dynamically programmable digital entertainment terminal using downloaded

3. 5594492 - Method and apparatus for rapid channel selection

4. 5477263 - Method and apparatus for video on demand with fast forward, reverse and

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as of
12/13/2025
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