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Hull, United Kingdom

John D Willingham

Average Co-Inventor Count = 1.00

ph-index = 2

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 = 33

John D WillinghamJohn D Willingham (2 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Royal Packaging Industries Van Leer B.v. (2 from 5 patents)


2 patents:

1. 5636769 - Negative pressure dispense system comprising a dispense assembly and

2. 5511692 - Fluid dispense system

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as of
12/18/2025
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