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Ojai, CA, United States of America

William D Castagna

Average Co-Inventor Count = 1.15

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 = 109

William D CastagnaShawn W Smith (1 patent)William D CastagnaJan Vanderford (1 patent)William D CastagnaWilliam D Castagna (5 patents)Shawn W SmithShawn W Smith (6 patents)Jan VanderfordJan Vanderford (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Unisys Corporation (2 from 2,439 patents)

2. Unisys Pulsepoint Communications (1 from 2 patents)

3. Unisys Pulsepoint Communication (1 from 1 patent)


5 patents:

1. 6961410 - Method for customizing information for interacting with a voice mail system

2. 6546084 - Voice mail system and method with subscriber selection of agent personalities telephone user interface address book and time zone awareness

3. 6442245 - System and method for providing voice messaging services utilizing a network connection

4. 6266400 - Method for customizing and managing information in a voice mail system to facilitate call handling

5. D309596 - Watercraft

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as of
12/15/2025
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