Growing community of inventors

Toronto, Canada

Donald A Urquhart

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 = 8

Donald A Urquhart ↔ Douglas R Hart (1 patent)Donald A UrquhartDonald A Urquhart (1 patent)Douglas R HartDouglas R Hart (7 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Landus Inc. (1 from 2 patents)


1 patent:

1. 4788437 - Tritium light

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as of
12/18/2025
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