Growing community of inventors

Oakville, Canada

John T Kelsall

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 = 3

John T Kelsall ↔ Theodorus A Gerritsen (1 patent)John T KelsallJohn T Kelsall (1 patent)Theodorus A GerritsenTheodorus A Gerritsen (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Hatch Associates Ltd. (1 from 16 patents)


1 patent:

1. 5471020 - Modal silencer

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1/20/2026
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