Growing community of inventors

Irvine, CA, United States of America

Doug Francis

Average Co-Inventor Count = 2.00

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 = 21

Doug FrancisMichael Serhan (1 patent)Doug FrancisDoug Francis (1 patent)Michael SerhanMichael Serhan (4 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Medical Depot, Inc. (1 from 25 patents)


1 patent:

1. 8840124 - Rollator having a sit-to-lock brake

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as of
1/11/2026
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