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David Stelpstra
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Amsterdam, NL
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Patents Grants
last 30 patents
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Patent Grant
Navigation device with adaptive navigation instructions
Patent number
9,086,294
Issue date
Jul 21, 2015
TomTom International B.V.
Pieter Geelen
G01 - MEASURING TESTING
Patents Applications
last 30 patents
Information
Patent Application
Navigation device and method
Publication number
20090177395
Publication date
Jul 9, 2009
David Stelpstra
G01 - MEASURING TESTING
Information
Patent Application
Navigation Device With Adaptive Navigation Instructions
Publication number
20090157294
Publication date
Jun 18, 2009
Pieter Geelen
G01 - MEASURING TESTING
Information
Patent Application
Navigation Device with Automatic Gps Precision Enhancement
Publication number
20090070038
Publication date
Mar 12, 2009
Pieter Andreas Geelen
G01 - MEASURING TESTING
Information
Patent Application
Portable navigation device with accelerometer
Publication number
20070260398
Publication date
Nov 8, 2007
David Stelpstra
G01 - MEASURING TESTING