Growing community of inventors

St. Catharines, Canada

David Duncan

Average Co-Inventor Count = 3.00

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 = 0

David Duncan ↔ Heiner Ophardt (1 patent)David Duncan ↔ Hendrik Ophardt (1 patent)David DuncanDavid Duncan (1 patent)Heiner OphardtHeiner Ophardt (224 patents)Hendrik OphardtHendrik Ophardt (11 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Op-hygiene IP Gmbh (1 from 109 patents)


1 patent:

1. 12137851 - Interactive display device

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as of
12/19/2025
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