Growing community of inventors

Drachten, Netherlands

Roelof H Sytsma

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 = 48

Roelof H SytsmaGerard J Lenting (1 patent)Roelof H SytsmaRoelof H Sytsma (1 patent)Gerard J LentingGerard J Lenting (4 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. U.S. Philips Corporation (1 from 14,087 patents)


1 patent:

1. 4632135 - Hair-grooming means

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as of
12/19/2025
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