Growing community of inventors

Washington, DC, United States of America

Ian Halpern

Average Co-Inventor Count = 3.00

ph-index = 1

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 = 10

Ian HalpernJoseph Louis Siegrist (2 patents)Ian HalpernJohn Piescik (2 patents)Ian HalpernIan Halpern (2 patents)Joseph Louis SiegristJoseph Louis Siegrist (16 patents)John PiescikJohn Piescik (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Art Technology Group, Inc. (2 from 20 patents)


2 patents:

1. 8081623 - Packet network based emergency backup telephone system

2. 7466689 - Packet network based emergency backup telephone system

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as of
1/2/2026
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