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Lancaster, PA, United States of America

Donald William Tomkins

Average Co-Inventor Count = 1.50

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

Donald William TomkinsPaul Dunn (1 patent)Donald William TomkinsRobert Edward Renton (1 patent)Donald William TomkinsDonald William Tomkins (2 patents)Paul DunnPaul Dunn (4 patents)Robert Edward RentonRobert Edward Renton (4 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Opsec Security Group, Inc. (2 from 9 patents)


2 patents:

1. 9279927 - Security device having optically variable device portion and method of making the same

2. 9025251 - Optically variable devices, security device and article employing same, and associated method of creating same

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12/21/2025
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