Growing community of inventors

Mississauga, Canada

Stephen Edward Ryan

Average Co-Inventor Count = 1.50

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 = 73

Stephen Edward RyanMichael Doell (1 patent)Stephen Edward RyanStephen Naumann (1 patent)Stephen Edward RyanStephen Edward Ryan (3 patents)Michael DoellMichael Doell (7 patents)Stephen NaumannStephen Naumann (1 patent)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Other (1 from 832,891 patents)

2. Ontario Cripple Children's Centre (1 from 1 patent)

3. Variety Ability Systems Inc. (1 from 1 patent)


3 patents:

1. 5778460 - Auxiliary toilet seat

2. 5265931 - Detachable child seat and supporting frame

3. 5044629 - Wheelchair accessible weight training apparatus

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as of
12/31/2025
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