Growing community of inventors

Houston, TX, United States of America

Andrew Duggan

Average Co-Inventor Count = 1.85

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

Andrew DugganDaniel C Ewing (2 patents)Andrew DugganChristopher Ryan Hern (2 patents)Andrew DugganJeffrey Williams (1 patent)Andrew DugganChristopher Ryan Hern (0 patent)Andrew DugganAndrew Duggan (4 patents)Daniel C EwingDaniel C Ewing (31 patents)Christopher Ryan HernChristopher Ryan Hern (23 patents)Jeffrey WilliamsJeffrey Williams (25 patents)Christopher Ryan HernChristopher Ryan Hern (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Baker Hughes Oilfield Operations LLC (3 from 830 patents)

2. Baker Hughes, a Ge Compnay, LLC (1 from 1,388 patents)

3. Baker Hughes Holdings LLC (227 patents)


4 patents:

1. 11891875 - Expandable annular seal tool and system

2. 11326411 - Thermal activation of liner hanger for elastomer-less completion

3. 11280162 - Power generation using pressure differential between a tubular and a borehole annulus

4. 11142999 - Downhole power generation using pressure differential

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as of
12/5/2025
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