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Nevada City, CA, United States of America

Brant James Callahan

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 = 0

Brant James CallahanRoss Alan Tessien (1 patent)Brant James CallahanDaniel A Phillips (1 patent)Brant James CallahanBrant James Callahan (1 patent)Ross Alan TessienRoss Alan Tessien (49 patents)Daniel A PhillipsDaniel A Phillips (12 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Impulse Devices, Inc. (1 from 46 patents)


1 patent:

1. 7218034 - Acoustic driver assembly with restricted contact area

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1/9/2026
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