Growing community of inventors

Oak Park, IL, United States of America

Gregory J Holderfield

Average Co-Inventor Count = 2.18

ph-index = 3

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 = 18

Gregory J HolderfieldDaniel Keating Childs (4 patents)Gregory J HolderfieldJ Lyell Clarke, Iii (1 patent)Gregory J HolderfieldGregory J Holderfield (4 patents)Daniel Keating ChildsDaniel Keating Childs (14 patents)J Lyell Clarke, IiiJ Lyell Clarke, Iii (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Clarke Consumer Products, Inc. (4 from 7 patents)


4 patents:

1. D613821 - Set of nozzles for a portable sprayer

2. 7478766 - Portable sprayer with connector mounting beams

3. D568961 - Handle for a portable sprayer

4. D536063 - Portable sprayer

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as of
12/10/2025
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