Growing community of inventors

Amsterdam, Netherlands

David Stelpstra

Average Co-Inventor Count = 4.00

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 = 6

David StelpstraPieter Geelen (1 patent)David StelpstraKees Wesselius (1 patent)David StelpstraSerhiy Tkachenko (1 patent)David StelpstraSerhiy Tkachenko (0 patent)David StelpstraPieter Andreas Geelen (0 patent)David StelpstraDavid Stelpstra (1 patent)Pieter GeelenPieter Geelen (46 patents)Kees WesseliusKees Wesselius (8 patents)Serhiy TkachenkoSerhiy Tkachenko (3 patents)Serhiy TkachenkoSerhiy Tkachenko (0 patent)Pieter Andreas GeelenPieter Andreas Geelen (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Tom Tom International B.v. (1 from 253 patents)

2. Tomtom Navigation B.v. (78 patents)


1 patent:

1. 9086294 - Navigation device with adaptive navigation instructions

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as of
12/29/2025
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