Growing community of inventors

Chicago, IL, United States of America

Michael J Duwell

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 = 10

Michael J Duwell ↔ Paul Bernhardt Specht (1 patent)Michael J DuwellMichael J Duwell (1 patent)Paul Bernhardt SpechtPaul Bernhardt Specht (35 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Heartland Chemicals (1 from 1 patent)


1 patent:

1. 4265584 - System for opening and emptying containers

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12/20/2025
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