Growing community of inventors

Sebastopol, CA, United States of America

Mark J Calahan

Average Co-Inventor Count = 4.00

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 = 7

Mark J Calahan ↔ Christopher M Botka (1 patent)Mark J Calahan ↔ Jack Nordquist (1 patent)Mark J Calahan ↔ Timothy J Damiano (1 patent)Mark J CalahanMark J Calahan (1 patent)Christopher M BotkaChristopher M Botka (5 patents)Jack NordquistJack Nordquist (2 patents)Timothy J DamianoTimothy J Damiano (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Parker-hannifin Corporation (1 from 1,662 patents)


1 patent:

1. 6040676 - Passive electronic damping for step motor

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12/29/2025
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