Growing community of inventors

Walled Lake, MI, United States of America

Alvan J Callahan

Average Co-Inventor Count = 5.83

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 = 5

Alvan J CallahanRichard Francis Olenzek (2 patents)Alvan J CallahanWilliam J Duncan, Jr (2 patents)Alvan J CallahanMartin Hefter (2 patents)Alvan J CallahanZinovy Soybel (2 patents)Alvan J CallahanSurendar Shawn Paul (1 patent)Alvan J CallahanDavid Louis Pieknik (1 patent)Alvan J CallahanAlvan J Callahan (2 patents)Richard Francis OlenzekRichard Francis Olenzek (9 patents)William J Duncan, JrWilliam J Duncan, Jr (2 patents)Martin HefterMartin Hefter (2 patents)Zinovy SoybelZinovy Soybel (2 patents)Surendar Shawn PaulSurendar Shawn Paul (1 patent)David Louis PieknikDavid Louis Pieknik (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Gm Global Technolgoy Operations, Inc. (2 from 30,963 patents)


2 patents:

1. 8585535 - High torque capacity three output differential

2. 8083628 - Differential carrier assembly for a vehicle

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as of
12/9/2025
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